That IS the good side. I don't mean to sound insensitive, because if he didn't reciprocate your feelings, that sucks, but it happens with everyone, straight, gay, bi, or other. You care a lot about this guy, and trust me, it is a MILLION times better for him to be understanding, if not reciprocating. He could be against it. He could want to stop being your friend completely. It sucks that he doesn't want to be more, or whatever, but on the scale of things that COULD happen, this is definitely in the top area.