Wow. Ummm I have had lots of bf troubles and I guess I'm ur gal to talk to. So I'm going to say that if u didn't tell him that u love him and he moved away then try to stay in contact. And if he moved out of state then Skype him or txt or call him.
Don't let ur love fall away. Love as long as u can. If he's just not that far away I'd say just try to see him every few months or so.
But I really think u should tell him u love him. That way he knows and if he doesn't love u back then u can always find another person to love and can always be friends with him.