This friend of mine has been flirting with me and I think she likes me but I don't like her like that..help?

Make it clear that you are just friends without actually saying it. Maybe ask some other friends to go to the movie with you and her so its not like a date. Maybe ask her for advice with this girl you like! Other than that there is nothing you can do except ask to talk and nicely tell her you don't like her like that. Good luck