Touch her shoulder casually while talking, if she is still smiling you have a shot.
If she's punching you, she's being flirty.
If keeps eye contact with you, she admires you.
If she keeps looking away, as soon as you look her way, she playing with you.
Does she truly like you? Only you can determine that from her body language.
If she makes flirty comments to let you know you might have a chance if you work hard enough, she probably likes you. If she's avoiding you and shooting down your advances altogether, she doesn't.
Go and talk to her honestly.
Then, await her reaction/response.
Just forget her. There are more fish in the sea, and there is no time to waste. You have one life to live. If she's interested, she will look you up and ask you where you went.
i hate when girls do that if she is acting or don't like i just dumd her and find another one
play the chase a little then YOU play hard to get. if she just walks away when you play hard to get she's playing with ya.