Witty pun hit it on the head I think, I found myself in the opposite situation to this, I wasn't sure what I wanted and kept sending my ex mixed signals while i was still with her.

when I noticed what I was doing I decided to stop seeing her out of respect even though i wasnt sure if i wanted to be with her or not because I could see I was putting her through what your going through..

Just step out of it mate she doesn't sound like she's gonna stick to her guns on any decisions and you don't want to be emotionally involved with ups and downs that you have no control over it will just mess you up.

Db