It can be challenging to deal with borderline personality disorder.

"Splitting" is common in bpd. It sounds like he sees you as "all good", then as "all bad".


Does your partner have a psychologist? Or a professional who can offer DBT therapy? Does he have a psychiatrist? Taking meds?

You need to look after your own mental health first and foremost.

Hopefully someone else here on this forum can give you advice, but you might want to examine whether staying in the relationship is worth it.

Although some people prefer not to use the term "codependent", but you might want to look that up and see whether you fit the description and what you can do about it. See whether or not you have the "savior complex".

One thing for sure is that your partner needs to take responsibility for his mental health. It's not your job to prop him up all the time.


Hope things get better for you... and for him...

Best wishes to you.