Cold behaviour from a girl for no apparent reason?

Does honestly seem like she fancies you, especially the last bit you mentioned about her acting uncomfortable when you approached her. Some girls start to act really shifty trying to act natural

Wait hang on a second...

You honestly want us to believe you think the act of wetting her lips means she dislikes you?

I don't know what it means, it probably doesn't have a meaning and a nervous habit? It's not a full on lick more of a stick tongue out to moisten, you get me.

Wants you roasted, all crispy then eat you with her moistened lips

She's a cannibal, stay away from her bro

Possibly because your a touch creepy, getting obsessed with her and making anonymous posts about her..

A girl I know seems to every so often so cold behaviour towards me for reasons I have no idea why. She seems ok with everyone else but me, she's cold.Any reasons girls do this? She can be nice one time and then the next she appears cold almost like I've upset her but I have no idea how.
A few things i also notice when she's on her own and i come into the room she will grab her hair, and i notice she wet her lips (subconciously) when im around sometimes too. i also notice she avoids standing next to me and one time i came to look at her pc and she looked uncomfortable when i got closer. all these just made me think she really dislikes me tbh.