How can you tell if a super friendly guy likes you?

Look for the signs - generally you can tell when even super friendly guys are being a bit fake. Watch him when he's around people he really doesn't like, and see if his behaviour is similar around you. If it isn't, hint that you're into him - harmless flirting, but don't get too out there just incase you're reading the signs wrong. But you're probably better off just asking him. Too forward? Then try and read the body language. But remember that there's always room for error with this approach. Basically, if this guy is willing to spend time with you over other people in the room, chances are he likes you. If he takes any available opportunity to talk to someone else, chances are...he might not... Good luck :)