Most Helpful Girl
if she likes you, she would treat you differently, like pay more attention to you, than she does with her other guy friends.
she might be more nervous around you, because she doesn't want to say something bad or awkward.
if she likes you, she usually won't talk about other guys or ex boyfriends in front of you.
she'd dress pretty to impress you, make sure her hair is nice. (though most girls do that anyways)
those are all signs she likes you more than a friend.