Dont get your hopes high! she might just be a fb addict!
But there is a chance.... try asking her out is what i have to say!
Good Luck!
It might mean she likes you or maybe shes just a creeper.
There is no actual guide on how to impress a girl on Facebook. The best advice for impressing a girl, anywhere and not just on Facebook, is to be yourself. Do not show off and pretend to be something you aren't, or something you might think she would want you to be.
She is trying to be nice and complement you so maybe you will get interested in her and maybe ask her out. All i know is that she wants something from you.
ask her!
Uesually when a guy likes you he will always pop-up to you on facebook and he will always try to find a reason to to talk to you eg; (boys do this alot) "Ryan fancies you, Ryan thinks your fit.." xoxo Gossip Girl
Watch the way she speaks.
I would guess she likes you. When a girl likes you, they enjoy long conversations. One or two word answers usually make a conversation longer, so she probably likes you. Hope I helped.
She does not want you to see what (or who) she is doing there.
Don't answer!
She might do that because she might feel shy to talk face-to-face
That doesn't always mean she likes you, but she might be interested.
A girl will always talk about him and stares at him or looking for him