<human>: Give me the gist of the text in a nutshell

After a breakup with my gf of 2 years back in December, she told me after we began talking regularly again (February) that I could still win her back. When I came home from school (I'm in a university, she's a HS senior) we had a great time, and were spending a lot of time together; she seemed ready for us to try again. That is, until I caught word in mid May that she was, in fact, starting to see someone (someone who I have always had a particular dislike for, and she knew it, but that is besides the point) despite everything she had been telling me.

Turns out that, as I had been her best friend for two years, she didn't want to lose my friendship. So she chose to quietly keep me on the hook and use me for the fun that we have together and the support I gave her. She never had any intention of getting back together with me.

It was cruel, but I can't stop wanting to get back together with her. I know that I should just move on, but I've found myself to be incapable, and I've turned down a few women because I have no interest in meeting someone new. Any advice?
<bot>: MY ex said she'd consider getting back together, when she was just using me for support and affection and is now seeing someone else. I'm having trouble moving on.