Friendship is two-sided. It isn't a friend just because someone's doing something nice for you. That's a nice person. There's friendship when you do for each other. It's like marriage - it's two-sided.
My biggest pet peeve are just girls who go to sports bars who have no intention on caring what teams are playing like they're looking for just a night out. That drives me more crazy than anything else. Like don't pretend to be a sports fan.