<human>: Can you summarize the given text in a few sentences?

So it started way back in high school, senior year. I had found the girl of my dreams and we started dating throughout the year and were left with the tricky question as to what we should do with college. We were going to separate schools states away but decided to stick it out. 

First year goes by great and summer was amazing. But before our sophomore years began we decided that it wasn't healthy for us to be together as long distance for so long so we broke things off. 

Now the tricky part is that nothing has changed. We still text and talk and visit each others schools a couple times a year. We hook up as we did while in the relationship and say things like I love you yadda yadda yadda. 

It has been killing me as we were now free to hook up with who we want and live a single life. That being said I still lived as though we were dating because nothing had changed. It is currently the summer going into Junior year and I recently found out she was falling in love with another guy while at school. Also that she flirts and has been hooking up since with guys since the break up. 

Of course I'm not mad because she wasn't cheating. She doesn't think I know what she has been doing and it kills me when she stills talks to me like I'm her boyfriend and we had still been hooking up over this summer. I don't know how to tell her that I want to totally end things and it baffles me how she can act the way she does around me knowing her past in college. 

Where should our relationship go form here/what should I do or say to make things okay? I still want to hang out with her as a friend after but I don't know if that is a possibility considering our past. Please help me out.
<bot>: I don't want to hook up with me ex but I still want to be able to hang out. How can this be done?