Maybe the boy means something or maybe he feels something inside that he could not express immediately.
It is difficult to determine the exact meaning without more context, as people's expressions can vary. However, it could mean that he initially found something amusing, but then his expression changed due to a change in his mood or reaction to what you said. It would be best to directly ask him if something is bothering him or if there is something he wants to talk about.
This means that he saw you looking at him so to be polite he smiled at you to say hi. You spoke to him thinking he was interested in you, but his smile only meant hi. Keeping looking you find that someone who smile will mean he is interested.
Something is on his mind.
That you're funny looking.
Facial - referring to the face or front part of the headExpression - the different muscular movements that indicate your mood or feelings, like smiles, frowns, or indications of puzzlement.
I would guess that they are laughing about something the guy said. I could be wrong however, so you may never really know unless you ask them what they were talking about.
your local fish store should have faces on their holding tanks, smiles mean the fish in that tank do well with others, frowns mean the fish in that tank don't do well with others
Not necessarily, but if he asks you out or something, then definitely.
If you mean "smiles" as a plural of "smile" then it would be "Osmehe" but if you mean it as a verb "smiles" as in "he/she smiles" it would be "smeje se".
Either he's daydreaming or thinking of how you look naked.
It means she's smiling while she's talking, probably nothing more.
It probably means they've remembered something funny from the past, if they are flirting with you:)
It means he's not comfortable and just doesn't enjoy your company. Hope I helped:)