If a person says hi to you and then laughs, they may be a shy person who doesn't know what else to say. Just say hi back to them and make a new friend.
When a teacher you know says hi to you it means they are being polite and acknowledging you.
THE MOST OBVIOUS WAYS TO TELL IF A BOY LIKES YOU IS IF HES SAYS GOOD JOB EVEN THOUGH YOU DID HORRIBLE IF HE STARTS HANGING OUT WITH YOUR FRIENDS AND IF HE LAUGHS AT YOUR JOKES EVEN THOUGH THEY WEREN'T FUNNY
Nothing. He is being nice. Say hi back.
He's flirting.
It could mean that or he is just trying to be nice.
it because she is shy when she talks to you in person.
it means he is complementing you but is a little odd.
I believe it means what the height temperature is.
crush
He really likes you
well i guess they are obviously nice!
is it possible that someone have told him about your crush. Or something about you is disturbing him. It is best to confront him and ask.