In regards to the sex,

I think for women, sex it more emotional than for men. Even if she's "trying" to treat it like a one night stand. It will still come down to her needing the connection with you, and if she cant feel it, she's more able to move on about it.

Basically what I'm saying is to make sure as best as possible, that you make it intimate for her. So she feels that connection again. That she wants that with you.

You know, the caressing, the touching, passionate touches that she's expecting from someone that LOVES her, not like a one night stand that allows her to move on.

Hope that makes sense, I didn't want to be graphic. Just saying fill an emotional need.