I have a friend who does exactly the same thing. Only difference is that she calls me in emergencies and gets annoyed if I don't respond immediately. I don't get it. I just figured she was flakey. A lot of people these days are flakey. I'm never going to change her behaviour, so I have to accept that if I want to remain friends with her I have to accept that's the way she is.

I understand the confusion you feel. We have a choice to remain in the relationship or not. I started thinking maybe she is manipulating me - especially with the emergency phone calls. I haven't made a decision yet, but I have been thinking about it.