staying with high school boyfriend in college?

I've been dating him for a year. there were major (stupid, but major) issues we had at the beginning that masked a lot of the smaller problems underneath. once the major stuff ended, I finally realized how little we actually seem to get along.

we don't have any of the same interests. it's difficult to just talk to him at dinner because he's always on his phone, but at school he'll talk to other girls with no problem. I'm way more driven and happy with change than him -- he just has a lot of childish habits that aren't indicative of someone I'd want to date going into adulthood. the only thing that's still always fun is the physical part; we have great sexual chemistry, but nowhere else. sadly, I've only got two friends at school and he's one of them. if I dump him now, I lose the physical connection and someone that I don't enjoy being around, but provides some relief from the loneliness of school.

i plan on ending it as summer rolls around and college comes closer.

is it worth it to keep him for another nine months? there's no one else for me to pursue, and I enjoy the romantic boy part of this. we just don't have the friend part, which really sucks. should I try to fix it bc we might go to the same school or should I stick with my original plan? I just don't see myself with someone like this in twenty years.