well,
Okay so, I'm a girl and if you have a friend tell the girl that you like that you like her it might sound like a prank...have you tried flirting with her? I wouldn't tell her that you like her until you know wether she likes you because you wouldn't want to tell someone that you like them if you dont know wether they like you back and make a fool out of yourself. Hope this helps!
she likes you and is trying to know wether you like her or not. If you do then tell her but if you don't then let her down gently.
she likes you and is trying to find out wether you like her or not without you knowing she likes 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.
ask her out