I don't think she knows what she wants I'm with a guy who just split from a 10 year relationship and I know he still loves her its hard for me to but I'm in a different relationship to you I have a kid to this man and yes I was the rebound. My opion is to confront her straight on what she wants and needs and what she expects from the future if its you then she shouldn't be like this with you as she will push you away.
You also have to think about yourself (which I haven't done) do you want to be with this person who still has feelings for there ex, this will cause many problems in the future for you as it has for me I'm still working on it 3 years later. Hope all goes well for you and you get the outcome you need. ;)