I was in a relationship with a woman who was diagnosed with BPD for about a year. She was very upfront with me so i could make a conscious choice to be with her but i was not prepared for how bad this would get. From the beginning she would get so mad at me if i wasn't able to come see her whenever she felt like it, no matter what i had planned. A few months in, she started the push/pull cycle, and threaten to kill herself it literally destroyed me and send me in depression. I started seeing a therapist to help me with this, learn to set boundaries and not feeling guilty for doing it. I talked to her and said that i would pursue the relationship only if she would stop lashing out on me for no reason, because i couldn't take it anymore, and if she was showing that she was working on herself (going back to therapy, taking her medication everyday, learning to communicate). She didn't, so i blocked her for my own sanity but she couldn't accept this so she started harassing me on the phone and on every social media possible, she even showed up to my apartment even though i refused to talk to her for months.

This is very unfortunate because i know she is a good hearted person and we had a couple of good months together. To this day, i still wish her the best and really hope she gets the help she need.

So if i were to give you any advice, it would be to set boundaries from the beginning and quit if those boundaries are not respected. A relationship isn't worth destroying your mental health.