Nah, I ain't in no "unhappy crush" or anything myself, but I didn't see any threads like this one around.
Anyway, you know what I'm talking about: you're in love with someone who doesn't return your feelings.
Alright, so how does it affect you?
Do you just wanna stay away from the person as much as possible, or do you feel totally down all day?
Personally I usually go "crap" and avoid the person as much as I can, and I'm pretty fine.
However, I've also had these moments when I found out some particular girl was already "taken", and then life sucked dangerously much for about a week.
It's fascinating how a relatively inacquainted person can affect another person's well-being like this...