What does a mix of half smile and smirk mean? This guy is weird with me... What should I do? ANSWER PLEASE?

[Anonymous]

Well, a guy I stared at once or twice, now, when I see him alone, he gives me a kind of mix of half smile and smirk, which troubles me. He didn't lower his eyes until I did.
Even if I didn't give him a smile in return, he kept smiling.

I don't know him and each time his friends see me, they talk or laugh.
One day, I was walking with my friends and they saw me, as I stopped walking, they did the same and turned their bodies towards me.

What does this smile mean?
Why are they so strange with me?

[lordAlex818]

I do the half smile-half smirk things to girls I think like me, even if I don't like them back. But if he didn't lower his eyes, he probably just doesn't really like you.

[Asker]

But, I don't like him. I don't even look at him more than once or twice. He's just imagining things, or what?

[lordAlex818]

Yeah, probably. We're not always right when we think girls like us.

[Asker]

But, there's something I don't understand at all... Why they stopped walking when they saw me, turned theirs bodies to look at me (even if I ignored them) and waited until I left the place?

[lordAlex818]

I feel like you want me to say he likes you...which is indeed a possibility. It is also possible that one or more of him and his friends are interested in one or more of you and your friends. Or maybe he told his friends that you like him.

[Asker]

I don't want you to say that. I can feel, to a certain point, what people are feeling (as many people, I think). And if he'd like me, then I would have felt it.
The thing is, other persons told me the contrary. So, you can understand I'm confused? I don't know who I should believe. But, one thing is sure, I don't trust this guys and his friends at all. Indeed, I felt annoyed when they were there. Which is - I believe - a perfect sign of intution.

[DoctorFeelgood]

"What does a mix of half smile and smirk mean? "

Gas pain?