Hi pqowie,

I'd like to welcome you to bpdfamily. I'm sorry to hear that you were cheated on, that's painful. It is possible that she has BPD, we're not professionals and can't diagnose, only a professional can do that.
What we can look at are BPD traits and we can have boundaries based around BPD behaviors. I read some traits, cheating is not a criterion, some pwBPD don't cheat. Risky behavior with sex, gambling, drinking is a criterion for BPD.
The hardest thing about all this? I desperately want to help her but I cant. Despite what I’ve written I really do love her… I considered her as my future wife, not a mere GF.
I want her to acknowledge that she has a problem and that she should seek help. I want her to grow and become a stable adult. I want to see her succeed and have great friends (she has none... or one Amar maybe but that relationship is also marred with cheating). I hope time or a miracle will suffice to bring her to her senses.
I felt the same way about my exuBPDw, I wanted her to get better, I felt a deep sadness, I had to come to the realization that she's a grown adult and I can't control her, the only thing that I can control is my thoughts and feelings.
I want to echo jambley, I understand the logic when we want a loved one to snap out of it or come to their senses, BPD is ingrained in someone's personality, and your personality is a difficult thing to change. That sounds pretty grim, you can recover from BPD if the person wants to change and do the work. That's something that's personal and we can't coax someone to do that.