There could be something in your teeth or he could think you have a beautiful smile. If he says it kinda sarcastically then you should probably check your teeth in the mirror.
it means the thinks your pretty and cute, hes flirting with you.
It could mean the girl finds him to be caring, and could even like him.
He likes your smile / he hates seeing you sad
It does not necessarily mean anything - he may not be interested in your smiling.
Say you love them back, or if you don't, just smile or kiss the or something.
It means he's nice, don't look to into it.
If you are a girl, and a guy tells you that you intimidate him, it means he things you are too good for him and out of his league.
act nice and smile.
or wants to be a good friend
well i would smile then i would tell him that's really attractive...then you would start to kiss him!
he wants you
When a guy tells you he feels a pit in his chest, he means that he has a chest pain.