My girlfriend has what she believes to be undiagnosed BPD. She goes through phases of pushing me away and realizes that she’s doing it even though she doesn’t want to. I’m just concerned because she seems to be be struggling with it, and I want to know if there’s anything we can do to help her out. 

I appreciate any advice, and I just really want to learn what someone who knows what this is like to show me what I can do to show her I’m here for her and won’t be driven off by this.