He's actually afraid that you would laugh at him or staying away at him if you would know, and OBVIOUSLY, he likes you. ;))
He loves you and doesn't have the courage to ask you out.
He probably doesnt want to lose you as a friend but doesnt want to be more tyan friends... So no
she smiles at him or blushes when he walks by or talks about him alot.
it means he likes her.
He either: Likes you-if he blushes at you when he asks Or a friend of his likes you and is too shy to ask you himself
It usually means she likes 'you.'
he doesnt have a girl friend
it means he has interest in you and mabye wants to be than friends
she doesnt have a boy friend
It could be true but if you want to be absolutely sure i would recommend asking your friend to ask the guy if he likes you. Or you could see who is the guy who you like bests friend and ask him/her if he/she could ask for you.
I would drop out of that class and tell s friend or a parent
It depends if his friend is a girl, then he may have some feelings for her or just be a shy guy but if its a boy he czn be gay or just embarassed what do u mean by signaled