I read your post in the LGBT topic, and I'm going through the exact same thing. I've been crushing on my best friend for over a year now. He knows I'm gay, knows how I feel, but he's sexually confused so I may or may not have a chance. Look, if you feel really strongly about this guy, chances are that you won't get over him unless you find someone else to focus your feelings on, or avoid seeing/talking to him. I've tried to get over my bestie but it's been a terrible fail.
Just wanted to let you know, you're not alone in that sort of situation.