Hi,
there is a lot of information is you browse around the website, maybe in your line, you could start here:
https://bpdfamily.com/message_board/index.php?board=10.0These boards offer support to families, during and after a relationship with someone with BPD from the starting point of compasion and understanding. Many people share very personal things and could be suspicious about someone from the legal field asking questions. I hope you understand.