
Let me welcome you here to the bpdfamily, and wish for you as much help and support as I have received. It's clear you have a lot in common with many of us here, and this is a community where we help each other, so I'm sure if you keep posting and reading you will find it helpful.
What do you think is the right direction for you, and the best kind of help you hope to get here? Did you agree to allow him to come and see you, or are you still standing with not wanting him to come?
Long distance relationships are hard in the best of circumstances. Dealing with a pwBPD makes them even harder. Then to complicate all of it with substance abuse; that just makes it all worse. I agree, there is no real way of knowing if he's still using or not. Only time will tell that.
You said that you've done a lot of reading about BPD. Has that reading include communication tools to use to help deal with the disorder? I know your life is difficult now, but knowledge will help you make the right decisions. Please read the articles and workshops - they will give you some good skills at communicating.
I believe you will be greatly comforted by the support here and the fact that we really understand what you are going through. We've all been there to varying degrees. Take care of yourself. We will look out for future posts from you.