I hear ya. I have talked to mine, she has cried and cried told me she is sorry and such. But she is moved out in a new apt with a new BF. She calls me sometimes and acts aloof, other times she is concerned about me and seems to want to stay on the phone with me.
when I saw her at Co office I was pretty much a mess and she was stoic after crying the day before. I am being friendly to her, giving her some more of the things she left behind tomorrow. I don't know what to tell ya. being nice to mine worked once before when she came back but it took a loooong time. Months. Slowly try to detach(I KNOW ITS HARD)
And tell yourself this is her problem. It will take time for her to look at things different;y.