Jeez, talk about "You want what you can't have".
Are you asking how to have sex or how to play this situation?
My 2 cents on the issue is to bang it out if that's what you want and assume it's a one time thing. She has been wanting it and hasn't been able to get it for so long it has driven her crazy.
I would do the following:
Don't show or say you're still hurt. Just do it (her) and be like, okay, thanks, that was fun and then say you have to go. If she tries to get you to stay, you know she's not solely there to get the bang out of her system. Look her in the eye and level with her. Ask her what she expects from this, but be indifferent to the outcome.
If she says she wants to date, say that you'll have to think about it, but regardless, you'd have to get to know her all over again because you're sure she's changed over the years as have you. (You're no longer needy and insecure and have grown into one BAMF, right?) Legitimately go out and get to know who she is now and decide if she's someone you want to be with. Sounds as if you're in the position of power now. Don't give it up, but don't manipulate her or be a dick just to keep banging her. (well, who am I to tell you what to do...but that's just my personal morals on the situation)
Demonstrate that she needs to win your approval, because she does. When she says and does things you like, open up to her more, touch her, be more interested. When she starts talking and saying things you don't like, just look like you're bored and around the room. (such as if she starts talking about her failed past relationship. Just give her a "cool" or a "sucks" and then change the subject) Make sure she knows what you're expectations are and the behaviours you want to see from her without explicitly stating it, but by how you respond to what she says.
Anyways, im no master at this, but from my experience with a situation similar to yours, that's what I would do. (and did do)
And quite frankly, I didn't blame mine for being pushed away by my super nice and needy behavior, but I was legitimately hurt and wanted to get to know her again. What I found was that once we met up and caught up, I realized how much better I was than her and wasn't able to get attracted to her in an emotional way so I just stopped responding to her and she took the hint. She was just a broken girl with no dreams and ambition and was winning at everything I did.