>So you'd think knowing he has someone, the love for him would die down

Actually. that doesn't really follow. Oftentimes, the ones we can't seem to get also generate the strongest feelings.

I can sort of understand your feelings, although I don't have a crush on anybody it's still been a long time since I was last in a relationship and the loneliness can be a little strong at times. Humans are social creatures, hard to live without connections to others.

As for him, if he's totally uninterested in you then I can't really offer a whole lot of suggestions. Might be worth making your feelings clear again just for the sake of trying but I honestly wonder if that wouldn't put a big strain on your friendship. Then again, I guess it's already under some pressure as it is.

Btw, are you typically high anxiety? If so, does this anxiety typify itself mainly in social situations?