If a girl is sending mixed signals and you think she likes you how do you find out which signals to listen to without asking her?

LISTEN to her ... and take what she says seriously. If you are asking her to go somewhere or do something or hang with your friends and she isn't interested --- its because she isn't interested in doing those things, not necessarily meaning she isn't interested in YOU. Spend more time doing what SHE wants to do -- where SHE wants to go. Find out more about her needs, and never assume that if she likes you she will like everything you do or that she'll like all of your friends. She will appreciate you much more if you make her more important than yourself. Good luck!!