So there's this guy..

I like a guy who is kind, always makes me smile and is pretty much everything I would look for in a boyfriend. And as much as I would love for him to want me back, I have to pretend I have no interest. One of the reasons is that he considers me as a friend. He once found out because my best friend told him without my consent, but I've been able to reconnect with him and convince him that I just want to be friends. And the other reason I have to get over him is that he likes someone else, who happens to be the same person who told him I liked him. You may be saying "he'll get over her", but he told me himself that he is in love with her. Through the months, I've tried to conceal it and be a supportive friend and put my feelings behind, but I can't. Any advice?