It's always odd to hear someone described as a "best friend" but they don't know that you're bi and that you are afraid that sharing something about yourself.
Since your friend has a girlfriend and you realize that your feelings toward him are largely a fantasy, then you really don't have that much to lose if you tell him. Bottom line: if he can't accept you as bi or that you have a sexual interest in guys, then he's not that much of a best friend, is he?
Perhaps in an ideal world, but for now, not everyone wants to give up the friends of their young years for a principle.










