<human>: So...Where to begin. If you do take the time to read this, thank you. I'm really at a loss right now and I don't know how to proceed.

To try and make this short ill skip over a lot of details. So in high school, I was a junior and met the really great girl. annoyed me sometimes but for the most part loved her and would do anything for her. She also loved me very much, I went away for a week and a half to Italy and she had a really tough time with the separation. Anyway, skipping details, she moved into my house with my family because her dad was a total dick. 

I went away for college and missed her incredibly. We were on and off throughout my time there, but for a majority of it, I tried to make it work. We both went through phases of trying to be with each other and trying to get over one another for years. But whenever we were together during breaks and such, we would always hookup. 

Anyway, fast forward to now. Were both home for summer, she's still in my house. Now she doesn't want to be physical or anything, I tried to convince her that we should have fun while we are home but she's not going for it. She admits that she does want to, but she doesn't want to get too attached when we both have to go back to school. I just went into her room to say goodnight but she kissed me and we madeout for a minute. After she apologized and said she shouldn't have done that. 

So I come here to ask, is there anything I can say to try and convince her that we should be together while we are home? please help this is driving me crazy. 
Thank you.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Longtime on and off girlfriend wants to be together but won't because she doesn't want to get too attached before we go back to college.