What can I do to feel better? To move on?

It killed me to make the decison that me and my gf (well now ex) needed to give us some space. We were on and off again, even though I really thought (well I still do think) she is the one. I would and have done anything for her. But with her depression, work, internship, she says she can't give me what I deserve. She graduates in May. Anyway, I dont drink, I am a recovering drug addict, (3yrs clean) so I dont go to bars/clubs and I dont know where to go to meet new people, or any other ways to meet new people. I really care about this girl, and she says she will wait for me, but doesnt want me to wait for her, but I would. Even if I don't date anyone, it's just to maybe at least make new friends. I work full time and i am fireman, plus I am very shy, and low self esteem. Any ideas?