he may like you there really isnt enough information in this question but if you dont know him say hi and introduce yourself.
Yes or he may be homosexual
um..... he's interested in you...... but that seems a bit obsessive, beware of him he likes you... but that is a little creepy
He doesn't care or he is trying to be cool and ignoring it.
It means he likes you or loves you very much and wants to see your beautiful face.
He really likes you and it can be a sign of affection.
it means he wants to do the yawn technique you know yawn and the put his arm around you
It means he wanted to sit next to someone and is trying to make friends.
Well either he's trying to be funny or he thinks of you as more than a friend (if you know what I mean).
A Hero Sits Next Door
He's either got a crush on you or he's envious of the clothes you're wearing.
The guy is clearly interested.
Remenber, guys ask girls out. In this case heprobably has a crush on you.