My girlfriend who was going to be my wife soon has BPD and after 7 years of push-pull she cheated on me during an anger-fit while away. This ended her in a situation where she was kept trapped by this guy while not being allowed contact with her family or with me. The guy turned out to be engaged to another woman where he had kids with and to be having at least 5 girls he switched between like he did with her. After researching the guy a bit I found out he had a physical abusive past (hitting women), and was planning to dispose of her soon. This would have left her disconnected from her family and without any support. The fact he had taken her to a different small town she wasn't allowed to disclose to anybody didn't help either. Long story short, she was going in a steady certain direction towards being out on the streets in a secluded place nobody knew she was with no money... Worst case: prostitution or death. I decided to attempt saving her, even though I was going through betrayal-hell, and I actually managed to do so. We've been trying again for a little over half a year now since it happened, but she has a hard time dealing with her guilt, which often will trigger more BPD-episodes, while the whole experience added to their intensity and quantity as well. At her worst moments she will block me all over again and treaten to repeat the betrayal, and she doesn't seem to understand how painful those words are to me now...

I refuse to give up on her though, even though she has repatedly given up on me several times...