Please answer... I had with my best friend FOUR times, and now I don't know what to do...?!?!?

He's gay. You are going to get hurt. Even if he's only "bi" (which is the same thing) he will never commit to you. Your relationship is going to change. He is going to get involved with another guy and not want to touch you. By then, you'll have become so attached to him it is going to really hurt. You will end up losing your friendship. And yes, friends having is friends with benefits. And it will ruin your friendship.