Why Do Pathological Liars Lie​ in Relationships? 7 Reasons

It starts small sometimes—a white lie here, a twisted story there. But over time, the pieces stop fitting. You begin to notice contradictions, strange gaps, odd emotional reactions… and that sinking feeling creeps in.

When someone you love keeps lying, not just once but over and over again, it leaves you spinning. You question everything—what was real, what was performed, and why it keeps happening even when the truth would have been easier.

It is not just about dishonesty; it is about how deeply those lies cut. They chip away at connection, at safety, at love.

You might even wonder, “Why do pathological liars lie?”

Is it fear?

Control?

Habit?

For whatever reason, being caught in that cycle can leave you feeling lost, unheard, and painfully alone—even in a relationship that once felt so full.

Note: This article is meant to offer insight into common reasons behind pathological lying in romantic relationships. It is not intended to diagnose anyone or excuse harmful behavior. If you have experienced emotional distress due to repeated dishonesty, your feelings are valid—and you deserve clarity and support.

What is pathological lying in relationships?

Pathological lying in relationships is not just the occasional fib or a white lie to avoid hurting someone’s feelings. It is a repeated, often compulsive pattern of dishonesty—sometimes about big things, sometimes about things that do not even seem to matter.

Over time, these lies create confusion, mistrust, and emotional distance. You start wondering what is real and what was ever true to begin with. It can feel like living with someone who is always wearing a mask.

And the question starts to weigh heavy: what is a pathological liar and why do they lie so consistently, even when there is no clear reason?

It hurts. It chips away at connection.

Why do pathological liars lie​ in relationships? 7 reasons

Sometimes, the lies feel random… other times, they are part of a pattern that slowly wears you down. When someone you love lies constantly—without obvious reason—it leaves you questioning everything. You might wonder why the truth is so hard for them or why the stories keep changing.

Understanding “Why do pathological liars lie so much?” in relationships does not take away the pain, but it can help bring clarity.

It might even offer a little peace, especially when you are stuck asking yourself: Why do pathological liars feel the need to lie in the first place?

1. To avoid conflict or consequences

Sometimes, lies are used as a shield. A pathological liar may fear that the truth will spark a fight, disappointment, or even rejection—so they hide behind dishonesty. Even small mistakes feel too risky to admit.

Instead of facing the reaction, they take what feels like the “easier” route: lying. But in a relationship, those lies add up. They might avoid the conflict at the moment, but the damage builds silently.

• How it appears in relationships: They might lie about where they were, who they talked to, or why they forgot something—just to avoid an argument. Over time, these cover-ups feel like constant emotional dodging.

What they might say

• “I was just working late—nothing happened.”
• “I did not see your texts until just now.”
• “I forgot to mention it… I didn’t think it mattered.”

2. To maintain control or power

Lying can give someone a false sense of control. When they shape the narrative, they feel one step ahead—less vulnerable, more in charge. In relationships, this often shows up in half-truths, withheld details, or straight-up fabrications meant to keep their partner guessing.

It becomes a way to protect themselves from feeling exposed. Sadly, this need for control replaces the honesty and openness love truly needs.

• How it appears in relationships: You may feel like you are always chasing the truth—never fully sure of the full story. They might twist facts or tell stories that keep you unsure and dependent on their version.

What they might say

• “I told you that already—maybe you forgot.”
• “That’s not what happened… you always misunderstand.”
• “You are just being paranoid.”

3. To hide insecurity or fear of rejection

Many pathological liars have a deep fear of not being “enough.” They worry the truth might make them seem weak, flawed, or unworthy. So, they lie to create a version of themselves they believe their partner will accept—or love more.

It is not always about deception for gain; often, it is about fear. These lies become their emotional armor… but that armor also keeps real connection out.

• How it appears in relationships: They may exaggerate achievements, pretend to like things they do not, or hide struggles. You start realizing you have fallen for a version of them that feels just out of reach.

What they might say

• “I graduated top of my class.”
• “Of course, I love that band—we should go see them!”
• “I’m fine; I never get anxious.”

4. To manipulate how their partner sees them

For some, lying becomes a way to manage perception. They want to be seen a certain way—more successful, more interesting, more desirable—and will twist the truth to fit that image.

It can feel deeply personal when you realize you were shown a version of them that was not entirely real. But this need to be admired, to keep up a facade, often speaks to deeper emotional wounds. The relationship starts to revolve around an illusion, not authenticity.

• How it appears in relationships: They might lie about their past, their finances, or their values. At first, this might seem like charm or confidence, but over time, the mask slips, and the numbers stop adding up.

What they might say

• “My ex still texts me—she cannot move on.”
• “I have a business deal in the works; I just cannot talk about it yet.”
• “I come from a family of millionaires.”

5. To keep parts of their life secret

Some lies are used to cover up things they never planned to share—past relationships, financial issues, unhealthy habits, and even infidelity. Instead of working through the discomfort of transparency, they hide.

This is often one of the more painful reasons because it directly breaks trust. The secrecy might feel like a betrayal, and understandably so. But again, the urge to protect their secrets often stems from fear more than malice.

• How it appears in relationships: They become vague, defensive, or overly private. You may discover hidden accounts, deleted messages, or bits of their life they never mentioned—and suddenly, nothing feels safe anymore.

What they might say

• “I do not remember ever saying that.”
• “I just do not like talking about my past.”
• “That friend? We are not even close.”

6. Because the truth feels too vulnerable or shameful

Sometimes, the truth carries shame—about their past, their feelings, or what they are struggling with. And instead of risking judgment or rejection, they lie. It is not always logical, and often it happens without much thought.

Vulnerability feels dangerous to them, so they replace it with a story that feels safer. But this “protection” keeps intimacy out, leaving their partner locked outside of who they really are.

• How it appears in relationships: They might shut down emotionally, hide past mistakes, or pretend everything is “fine.” You feel them pulling away—but when you ask, they keep saying, “Nothing is wrong.”

What they might say

• “I do not have any regrets from my past.”
• “I am totally over that—it does not affect me anymore.”
• “I am fine. Just tired.”

7. Because lying has become second nature

In some cases, they lie so often that it becomes automatic, blurring the line between fact and fiction. Their lies are not always calculated or meant to hurt—they are just how they have learned to cope with the world.

That does not make it okay, but it does help explain why pathological liars lie so much, even when there is nothing to gain. Over time, the habit replaces honesty, and relationships suffer deeply in the process.

• How it appears in relationships: They lie even when there is no clear reason. The stories shift, the details change, and you are always left wondering, “Why lie about that?” It becomes exhausting to keep up.

What they might say

• “My phone died—that is why I didn’t call.”
• “I never said that… you must be confused.”
• “I was already home when you called.”

Is pathological lying a mental health issue?

Pathological lying, often termed pseudologia fantastica, is characterized by chronic, compulsive lying without clear benefit or motive.

While not officially recognized as a distinct mental health disorder in the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), it is frequently observed as a symptom in various personality disorders, such as antisocial personality disorder.

Individuals exhibiting pathological lying may experience significant distress and impairment in social and occupational functioning.

5 ways pathological lying affects romantic relationships

When lies slip into a relationship, again and again, something starts to break—not always loudly, but quietly, slowly, and painfully. You begin to doubt the words, the memories, even yourself. Pathological lying is not just frustrating; it is deeply destabilizing. Love cannot breathe when honesty keeps disappearing.

1. It breaks emotional trust

Trust is not just about the big things—it is built through everyday truth. When lies keep surfacing, even small ones, emotional trust begins to unravel.

You start to wonder if you can believe anything at all. It creates a subtle tension that never fully goes away. That “safe” feeling between you starts to disappear.

2. It creates constant confusion

When stories change and timelines shift, you are left trying to piece together what is real. You replay conversations and second-guess what you saw or heard… it is exhausting.

The relationship feels like a maze with no clear path. Confusion becomes your default, and clarity feels miles away.

3. It damages emotional intimacy

Emotional closeness relies on honesty. When someone keeps lying, it blocks real connection—even if they say they love you. You can feel them pulling away, even if they are physically present.

It becomes harder to open up or be vulnerable. You start to guard your heart, and that changes everything.

4. It leads to self-doubt

After hearing enough lies, you might start to question your own instincts.

Did you imagine things?

Did you overreact?

That constant gaslighting—intentional or not—chips away at your confidence. You lose trust not just in them but in yourself, and that can be one of the hardest things to heal.

5. It threatens the future together

It is hard to build something lasting when the foundation keeps shifting. Plans start to feel uncertain, promises lose meaning, and the idea of “forever” feels fragile.

You want to believe in the future—but deep down, it feels unstable. Without truth, even love has limits.

Can a pathological liar truly love their partner?

It is a painful thing to wonder—can someone who lies all the time still love me?

The short answer?

Yes… but love alone is not always enough. A pathological liar might deeply care, miss you when you are gone, feel attached, and even want the best for you. But love without honesty turns fragile; it cannot grow where trust keeps getting chipped away.

Sometimes, they lie to protect you or themselves or because they simply do not know how not to. But real love needs vulnerability, not just emotion.

So, while they may feel love in their own way, their actions—especially their lies—can still cause harm, even when they never meant to.

Can pathological liars change in a relationship?

Changing deep patterns like pathological lying is not easy—but it is not impossible either. Relationships can create powerful motivation for growth, but only if there is honesty, willingness, and emotional safety involved.

So… can pathological liars really change in a relationship?

Yes, but it takes more than love—it takes effort, accountability, and time. Let us walk through what that change might actually look like.

• They must first recognize their behavior

Change starts with awareness. If someone cannot see their lying as a problem, there is very little chance they will take steps to change it.

But when a person finally admits, “This is hurting me—and the people I care about,” something shifts. That awareness, though painful, is the starting point for growth.

• They need a safe space to be honest

Healing cannot happen in an environment full of fear or judgment. People who lie pathologically often do so to protect themselves—sometimes from shame, rejection, or past trauma.

A safe, compassionate space gives them room to try something new: the truth. It does not excuse the lies, but it helps create space for better choices.

• Therapy can help unpack the deeper reasons

Pathological lying is rarely just about the lie itself. It is often tied to deeper wounds—fear of abandonment, low self-worth, or childhood conditioning.

Therapy offers tools to explore those roots and build new ways of relating to others. With professional support, lasting change becomes much more possible.

• They must rebuild trust slowly and consistently

Once the lying stops, the real work begins. Trust takes time to earn—especially when it has been broken repeatedly.

It is not about one big gesture but about showing up honestly again and again. Small truths, spoken consistently, can slowly mend the cracks.

Watch this video where Lauren Consul, LMFT, explains how to rebuild trust in a relationship:

• The relationship should not carry the entire burden

Love can support change—but it cannot force it. The partner of a pathological liar should not have to become a therapist, a detective, or a constant forgiver.

Healthy change involves both people having their needs met, not just one doing all the work. There needs to be balance, mutual effort, and clear boundaries.

Final thoughts

At the heart of it, lying in relationships is rarely just about being dishonest—it is often about fear, protection, or old emotional wounds that never healed. Understanding the reasons can bring a bit more clarity, even if it does not erase the hurt.

If you have ever wondered, “Why do pathological liars lie?” when love is supposed to be built on truth… know that the answers are layered, human, and sometimes painful.

But with awareness, compassion, and boundaries, there is room for better choices. Healing might be slow—but it can begin with just one honest moment.