What can i do with missing someone?

Hello. My Bf of three years and I recently broke up three months ago. He said it was over distance and because he doesn't get to see me as much as he used to anymore he doesn't feel the love for me anymore. We were both 17 and in hs when we first dated. Now that he's in college he's a changed person. I wrote a letter to him a few weeks after the break up asking why? It was all so unexpected. He just told me he tried but couldn't be happy with me. But he says he wanted go be friends because we had so much history together. I said fine. This was all over email. I told him this email back and forth was getting childish. And he ask if I had any suggestion and I told him I didn't clearly he can give me a call rather than emIl but. He never emailed me back. The next month he found himself a new gf. I have been in no contact with him. Its hard and I hate to say I miss him. And that I might not see him again because we will always be far from each other. I don't have real close knot friends to support me, and I just feel so much pity for myself when i see people together and happy. I don't think I'll find anyone anytime soon. I'm not ugly, I'm just a mix of shy and outgoing and ppl might find it weird. Do i contact him since I'll be leaving the state for a few months. Idk if he even wants to hear from me or if he's hiding his feelings. I'm just really sad and lonely, he was my first love an best friend who broke my heart. but i hide it all very well. :-/