Watch his eyes, and how he changes when he sees you. If he positions his body towards you, even from across the room, then he might be interested. I don't know how old you are but young guys are very shy until they get their feet wet.
Don't push it, just be nice, and a bit mysterious. Works all the time.
The guy will have to tell you but when you do the guy will most definetly know.
http://www.wikihow.com/Know-if-a-Guy-Likes-You
i do! he's not a guy guy though
Check his pants.
Check his pants.
If a guy is truly in love, then will know by the way he looks at her, acts with her and talks about her when she is not there.
The guy you know the guy that sung that song before you know what i mean the guy :D
If a guy likes you but you don't know him he may look at you or walk by you whenever possible.
The guy will be sweating and he will be smiling nervously!
if one of ur friends is a guy
You ask the guy.
the guy tells you