could be a number of things:
you got on bad terms with em
to assert dominance(who knows why)
possibly a way of flirting
I am a guy so I would know. First of all I have been disgust by a lot of girls so if he looks at you in a wierd way or just makes an escuse or something like that you would know.
It may very well mean that a drugged guy is looking at you
That he wants to "get to know you better."
They have the same interests
he is starstruck
Nothing. He is a nice guy.
it means she likes him
Not necessarily.
He is simply a guy! guys do that unfortunately!!
It depends what her stare looks like. If she looks at you in disgust, that means she finds you gross or yucky. If she looks at you in awe, that means she likes you or finds you cute, hot or sexy.
If a guy looks at a girl when she is not looking, that does not always neccessarily mean he likes you! Hope this helps! =)
...it means that the guy you like, likes you!