I've been dating a BPD girl for a few months now. She has been very open about her past since the start. We had some issues starting out, but they were resolved. 

One thing that is very important to her is the relationships (friends/family/SO's) she has and how she would never do anything to potentially lose them which is something we've talked about a lot. She was hesitant to even enter a relationship because of the risk of losing, but there was no pressure from me and we eventually decided to date. 

It's been working out very well. I've supported her through depressive episodes/unwarranted anger towards me all of which I haven't judged her for because I know if it's hard for me it has to be incredibly hard for her. She has been to therapy in the past, but had a bad experience and hasn't been in a few months, but she is definitely doing better and is still recovering, or so I thought. She has told me that her past drug use was very impulsive and if she was around it she couldn't help, but use it. Another impulse she had was self\-harm, but she has since then replaced that with stealing which she has tried to justify. We knew we had to set boundaries to be successful so she agreed to completely avoid drugs and not steal things around me.

Cut to now, after we've had many discussions about her only wanting me to trust her and how grateful she is for me and how I support her in the ways she needs, I found out that she's been stealing my prescription drugs from the start all the way up until a few days ago when she stole more. I am obviously very disturbed by this because it basically breaks all the trust she has assured me is there, but still I tried to see it from her point of view. I still think even now that she is more of a victim than I am, but I don't know what to do. She broke down when I called her out on it and has been in an extreme depressive episode for the last 3 days. She barely responds to my texts or gets out of bed. I know she probably needs me to come to her, but I have work and it's not easy to make the drive. Any other attempt I've made to talk to her and keep her from being isolated has been shut down as if I'm doing everything wrong when I've given as much as I can to this person.

Any insight or advice that can be offered would be appreciated. I'm open to all questions or responses.