He might want to go out with you or he liked the kiss
It does not necessarily mean anything - he may not be interested in your smiling.
You can tell a guy likes kissing you.When your done kissing a guy,he'll look you in the eyes and mabye he'll bite his lower lip.He might as well get a smile out of it.So go ahead and do it,you'll see what I mean. answer usually when he wants to do it with you again. frequently.
If your boyfriend cannot stop kissing you, it may be a sign of violence. Dump that guy.
It means he's nice, don't look to into it.
act nice and smile.
If he's a guy it means that he's gay.
It mean he is trying to let you know he likes you by complimenting you.
He wants to have sex with you and "put a smile on your face."
That you like him
It means he likes you.
he has acknowledged your existence, good for you! (if you like him)
It means that he likes it.