You know if she likes you if she smiles or blushes when you talk to her or if she gets all giggly near you. Also, if she looks at you whenever you walk by her, she's interested in you. If she passes by you try to make eye contact, that can tell you a lot. If she smiles and says Hi then she may like you
ask her who she likes
Get to know her.
this is simple get to know this girl
If a guy look at the girl twice then it means she likes the girl
That means he girl likes you and answer that question by telling the girl something she likes to do. If you don't know what the girl likes to do then you're a goner
if she talks to you and touches you on the leg or something like that. then that means she likes you.
I gess the same way you can tell if a normal girl likes you.
Ask her.
If no on likes you
ask her out
go to 'ask' and type in 'how do you know if a girl likes you' you should find all you need there
just ask her if she likes you