Replying to So, my gf and i are through

I mentioned today on the phone that i wasn't sure how well the long distance relationship was working for me. I suggested that perhaps a open relationship might be easier on the both of us until i got back up in the fall. She then proceded to tell me she wasn't feeling a relationship at all anymore. I guess i brought it up, but it still sucks. I really did like her, and the last thing i wanted to happen was for her to not visit, but we're just so young you know?