What's up with this girl? Does she like me or something? Help?

[T]

Theres this girl in my lunch period, shes pretty. But i was always catching her and her friends just looking at me. Btw, i never look at her. It was like every day, they would have to turn their heads to the left to look. I even sat somewhere even farther way from where i usually sat. So i was pretty far away from her and she turned her WHOLE body around to look at me about 2 or 3 times. So about last week, i decided to inbox her on facebook. I said "hi" and she replyed with, "hii. Do i know you? Lol" and i said " i dont think so, but i see you at school a lot and i just wanna get to know you better lol" then she asked how old i was, and i told her (im in her grade and then i asked "wats up?" And then she just stopped replying. And a few days ago, her and her friends were walking and they saw me and she looked at me again. Then later that day a teacher talked to me and they were there, and i heard one of her friends say "thats him" or something like that. Btw ive been told im pretty good looking ( not trying to brag). If that helps anything but whats up with her though? Why was she always looking at me and reply like she doesnt know me at all? Im confused, help??

[luvnatles]

Ugh she's one of those shy girls that have these major crushes but are too afraid to do anything. Not worth it. They said that's him cuz they think you're hot(congrats) and you IMed her and she just didn't feel like going into conversation cuz wuts up isn't a good question to ask a girl. Say ANYTHING ELSE. Say what you're doing if possible. They are probably the geeky girls who aren't confident with guys. Move on.