Well, if SHE asked you to the dance then spent all that time with you, I'd say that's a good indication that she likes you. Why not just ask her?
I am friends with her. I text her. She asked me to a girls choice dance and we were slow grinding all night. A friend told me that she told him she wanted to kiss me that night. She also told me she used to like me. Does she like me?
She definitely seems interested in you! :)
*in sarcastic voice* No, man. Just because someone wants to kiss you after asking you to a dance and slowdancing all night doesn't mean she likes you.