Studies show that of those with Borderline Personality Disorder (BPD), 60% are married.
Borderline Personality Disorder is an illness that can be very difficult to handle in a marriage because of the symptoms. The National Institute of Mental Health suggests those who suffer from BPD are often impulsive, have symptoms of depression, suicidal behavior, anxiety, anger, fear of abandonment, and extreme mood swings.
Being in a marriage with someone who has BPD is not easy (this article "Dating someone with BPD" is everything!) especially if your spouse refuses to take care of their illness. Still, you can manage it to a great degree if you love your spouse and understand that it is a condition and not their intention to be this way.
Here are some tips for being in a borderline personality disorder marriage:
Don't ignore your spouse if they are threatening suicide
Encourage them to get help in therapy and from their doctor
Validate their feelings
Encourage them to take responsibility for their health
Seek support for yourself and your loved one