Well, she doesn't hate you obviously. I think there's some interest there or she wouldn't be complimenting you or playfully hitting you. I think right now she thinks of you as a friend. Ask her out for coffee and slowly break the friend barrier. Then if the coffee date goes well, ask her out to a movie/dinner or something fun like bowling/rollerskating/ice-skating or ask her out to a mall. I think malls are good because there are lots of things to do there. Hope this helps!
I will do my best to reply with an educated, humble and honest answer. Ultimately, it is up to you whether you want to listen to my advice or ignore it completely. Sometimes, my advice may be wrong; occasionally, it will be right. Regardless, I want to do my best to give people answers they are seeking.