hi Raymond007!
We have a great book list here too that you might want to pass on to your friend:
Book Reviews - Top RecommendationsLike
Narellan said, probably the most helpful thing would be for your friend to sign up in the bpdfamily community herself so she can get support for her relationship first hand. And really, she has to be the one to want the help or she won't follow through anyway. It's so hard to see people we care about go through pain they didn't need to, but we have to be willing to respect their choice to be in the relationship or not.
How does she feel about it? She keeps going back, so she doesn't seem to be seeing it as an entirely bad relationship, no matter what the future might bring. And many people with BPD are capable of having a relationship--like we nons, they're all individuals too.
How have you done in the years since your ex left? Have you been able to move on successfully and have other relationships? It sounds like she left a pretty big stamp of disapproval on you.
Welcome back!
Elpis