Women are emotional beings. You cannot confront her logically the same way you could a man. You have to make her
feel something for you, then you've got her hooked. The second you said "The summer was ending so I expressed my feelings for her" I knew it didn't work.
I would do something light and playful with her. Take her out for drinks somewhere cool (providing that you're both 21 or older). Have fun, act like everything's no big deal. Go on with your day as if she's just any other girl. Invite her to stuff when you're free. Try this different approach and you should be able to have her.
My 2 cents, she sounds like she's just having fun right now so have fun right back. If you're both having fun together it could lead into something.
If you believe in the LOA think of it like this, you're serious and she's not so it equals no connection. If she was serious but you weren't it would also equal no connection. But if you're both having fun..... maybe a serious connection
