What does it mean when a girl says aww after you said you like her?

If when she said it her eyes were big and wide open not looking at you that means she likes you. If she didn't do that that probably means she doesn't like you. But if you want to get her to like you this means you should flirt with her, buy her something like chocolate, and you can walk her to some of her classes. I hope this works. Good luck!