Girls (guys too i guess), i want to know if she like's me?

A couple nights ago, a friend of my ex and i, (my ex and i have been friends since we broke up), were at a party and we were watching a movie. I sat on this small recliner ( had barely enough room for two people, and she asked if it was alright to lay down with me. Now i didnt lie down with her, she just laid down with her legs on my lap. Well she had a little blanket but she could have been completely covered, but she kept her legs out, (this could be a hint) but she was also wearing short shorts. Well i notice that a while after the movie started that we both did one thing. I put my hand on her leg. She started moving her legs closer to my "waist area" and was sorta rubbing, but that might have been my imagination. So is she just being flirty or is she interested in me. (Also, she has never had a serious boyfriend)