How do I get over him?

oh honey, this happened to me too, only I told him I liked him and then later he fell for me but he was with the other girl. Grin, and cheer him on, just keep being his best friend, once he's out of a relationship, talk to him about it, but it isnt fair to him, you, or the other girl to admit your feelings right now. It will just make things more confusing for all of you, especially him. Even if it crushes you, if you love him you'll want to see him happy, even if its not with you