Hi once_toronto,

I can relate with feeling emotionally distressed and confused. I would like to add that I felt isolated because I couldn't get advice that helped me and my relationship with a pwBPD. Advice from family, friends, therapists, marriage counselors didn't work because they didn't understand that my ex wife had traits of BPD.
It sounds like you have the right idea with self protection, a pwBPD have insecure attachment styles and fear abandonment, the distance may trigger him and he may act out.
A pwBPD have low self worth, feel insecure, usually suffer from clinical depression and anxiety and need a lot validation and strong boundaries. To answer your question about if it gets better, you'll find relationship tools for a pwBPD that will help you on the right side of the staying board.
I'm glad that you have found us and decided to join the discussions. You're not alone.