What do you do if a girl knows you like her?

well im a girl and recently a guy liked me and i didnt like him so if she dosent like you then stay out of her face, dont keep looking at her if she can see you, this just creeps us out, and dont act like a dick around her so be cool.

but if she likes you then just go and talk to her and say hi or something, smile at her, but not obsessively, and again just be cool

goodluck ;)