it may mean that he likes you and now you started at him you two may become boyfriend and girlfriend
More than likely, I presume.
it means the guy should only be focused on his first girlfriend and not staring at another girl.
well that depends whether its a love stare or a mean stare. if its a mean one and hes staring at you to get you back for staring at him in class, the probably but if its a nice stare then no.
girl this means the guy totally likes you! congrats! or he is interested in other things like maybe your body so look out don't let anyone take advantage at you good luck!3)
Doubt the incidents are connected. Maybe you got hotter?
It depends on the type of guy, I suppose. I don't really get your question, though, why 'half a year'?
he likes you and is thinking of you more and more each day.
He's embarrassed; when he saw you looking he probably thought you'd caught him, so now he's afraid to look at you because he doesn't want to get caught.
Nope! He might be developing a crush on you, even though he has a gf
YES!!
probably he or she likes you
It stared during the 1920's.