
I think you'll find a lot of parallels here - lots of members (including me) have similar stories. I'm sorry for what you're going through but glad you have found a community where many of us have been through similar experiences, and we can learn from each other.
How long have you two been separated? What was the immediate cause of the separation?
I'm not a doctor, so I cannot say whether or not she has BPD. There is a link in the menu at the top of the page that may shed some light on the situation.
Educate yourself as best you can about BPD. The more you know, the easier any decision you make will be. I know your life is difficult now, but knowledge will help. Please read the articles and workshops - they will give you some good skills at communicating.
I look forward to reading more of your posts. Take care of yourself.