How do I deal?

I've been in the same situation as you and it was quite hell. Finally I went for it and after I found out that she had really no interest in me that way it became easier to just let it go. For a long time I wondered how we were supposed to be friends if she said no, but it ended up working out that we could still be friends without it being weird and I no longer wrack my brain over her. It seems to me that you can either sit and think about him and wait for him to act, but maybe he never will.