my expectations are just to be able to her since she was asking for it. Seems like she just needed me while she was in an emotional crisis but once it's passed I'm back to being worthless. She seemed very genuine. And also she's admitted she has this problem. She was saying thanks you for making her aware... She's looked back at her life and it makes sense now. And for the first time ever she actually said "sorry" for what I went through with her. And I don't know if she's still with this guy or not. She's the one who came to me and cheated on him with me for a week, we fell back in love etc til she snapped on me and went back to him just last week. This is the first time I've heard from her since.
The behavior of pwBPD is erratic and can change instantaneously. To truly change maladaptive behavior, a pwBPD needs to be ready and willing to accept. Changing these behaviors takes therapy and time. You cannot change her behavior. Only she can change it. Although you cannot change her behavior, you can change yourself.
Are you willing to cope and accept this type of behavior?
I think a large part of answering that question is to look at yourself and determine what you want.