Should I just see other people?

wow, the same thing happened to me. I hung in there, gave him his space. Gave him time to adjust to his new job. I was lonely and miserable. I loved him so much, I was loving and unselfish. But I guess I gave him too much space, he fell in love with a co-worker. I'm not saying this will happen to you. Tell him you are lonely and feel left out. Be honest. Then see if he steps up...if not, do what you have to do...