What does it mean when a guy......??

Question

stares at you? Does it mean he likes you and wants to ask you out. Or that you have a nice ***?

Answer 1

Probably.
Is he staring at your face, your chest, or your ***?

A glance or 2 at chest or *** is to be expected- but if he's not looking at your face, he's not interested in your expressions or mood.

Face staring is more likely to be involved with thoughts of asking you out- he'd be wondering about your response, which may be dictated by your mood.