How do you know if a guy thinks your pretty or ugly?

Being a boy, this should help. He'll look at you a lot, but then turn away really quick so that you don't notice him. When someone next to you is talking, his eyes may drift over to your face (for some reason we always do that, as if you're "irrisitable") and then won't look up for a while. He'll also try to sit near you a lot, but not make it obvious. Hope this helps!!

~Daft Punk rocks