On posts or comments: If they 'like' most of your comments or posts, that could mean they like you.
On chat: If they flirt with you, message you smiley faces etc, or ask questions like these:
*Who do you like/love?
*Do you have girlfriend?
*Do you like/love me?
etc.
On games or apps:
*In a game like Sims Social, if she starts a relationship with you, that could mean that she likes you.
*In an app like 21 questions, and she answers questions about you like this:
*Have you ever had a crush on ---------? Yes.
*Would you hook up with --------? Yes.
*Has ------- Ever had a crush on you? Yes.
etc.
Do you know that your facebook, likes will pay you back ?
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.
When she looks at you during class a lot. When she comes over to talk to you, when she blushes, when she smiles at nothing, when her friends know a lot about you, when she likes your statuses on facebook.
ask her!
Watch the way she speaks.
They will add you as a friend & talk to you.
The girl who likes me just said so in an e-mail. I suggest that or possibly facebook if you know the guys email or facebook. If not, just go tell him. That's how i would want a girl to tell me she likes me. or have a friend tell, but that's kinda lame and the guy mite not
ask her who she likes
She does not want you to see what (or who) she is doing there.
Don't answer!
Take my word for it, every single guy on Earth is extremely desperate for a girl. He likes you. Ask him his favorite music. Be friendly to him.
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.