First of all, if a guy stares at you for longer than a second or two, he's definitely thinking something.
A blank expression though, could just mean that his eyes happened to wander over to you, while he was thinking. It could mean absolutely nothing.
On the other hand, it could mean that he wants to stare at you, but doesn't want to seem interested? Haha, I have no idea. Sorry.
It could indicate that the person is observing you from a distance but feels uncomfortable or shy when closer to you, which is why they avoid making direct eye contact. They may be interested in you but unsure of how to approach you.
It could mean he is interested in her or finds her attractive. It could also mean he is simply paying attention to the conversation.
It could mean that the guy noticed you staring at him, and when his friends look in your direction, they might be teasing him or trying to figure out why he caught your attention. It could also indicate that they are observing his reaction to being stared at. These reactions can vary based on the individuals and the situation.
It could mean that the guy is unsure about his feelings for you or is sending mixed signals. It might be helpful to talk to him directly about your feelings and see if he is willing to clarify his intentions. If the pattern continues without clarity, it might be best to reassess the situation and consider if it is worth pursuing.
It could mean that the guy is shy or lacks confidence in approaching the girl directly. His actions suggest that he may have feelings for her but is unsure how to engage with her.
he deeply in love
If he "sometimes" looks at you, or stares at you "without expression" it means one of two things: You are obsessed with him, or you are very, very paranoid.
he probably likes you, or he is in love with you....
He is stupified with lust. --- or he is just thinking about something else and happens to be looking that way. ;)
he wants the D.
If he stares, and quickly looks away when he looks at you, then yes. If he just stares, and stares, and stares and doesn't even flinch when you look at him, then no.
She simply wanted to be in your place.
It means he likes you.
He likes you
As a guy, i admit i do this. When a guy stares at a girls butt, it means he is attracted to you. When he stares at your lips, he is hinting that he wants to kiss. I don't know if you are in a relationship with this guy, but if you are, take the risk when he stares at your lips and kiss him! Guys make the first move a lot, but they love it when the girl does!
Nothing, unless he stares at you, which means he's a pervert.
He is really into you, and not your body so much.