It could mean that he is interested in her sexual preferences or wants to see her in lingerie. Communication is important in any relationship, so it might be a way for him to gauge her comfort level and boundaries regarding intimacy.
Hes a crossdresser
yes or the guy is just flirting with the girl
It means that since the guy moved on he asks the girl if she has moved on to to have now made her now let down easily.
to know whether she is younger than that guy or not...
To be his regular girlfriend.
it means you like him but if he asks you to then he likes you!
No, because what if the boy asks a guy and what if the girls asks a girl? So the answer is no, but it depends on how the person will look when asking the question.
He's trying to woo you....
it means that he loves her This means that he is interested in her.
A guy who asks that question is worried that you do not fully respect him. It is up to you whether you think he should be reassured or not.
guy asks girl end of
it means he wants to have sex
It might mean he's shy to call you.