I am in love with my homosexual guy friend. What should I do?

Hon', you need to realize that you have feelings for someone that is incapable of returning those feelings. If you can't handle it then you might need to keep your distance. It's a no-win situation unless you can keep a strictly platonic relationship with him. And, from what I've read, at this time, you can't. Maybe in the future after a long time away from him, you will. In the mean time, you need to spend time with your friends and around hetero. guys with whom a relationship is possible.