does my lesbian friend have a crush on me?

We have been friends for two years. In that time, we have had a lot of random, silly fights with art supplies during class that are instigated by her, and seem to be an excuse just to touch me. Second, whenever we are sitting on the floor she puts her head in my lap, and never does that with any of her other friends. Third, she might have asked me out before I knew she was gay and she knew i was straight. She asked me to go to the movies with her, which wouldn't be weird if I didn't know that all of her first dates are movie dates, and the offer has never been extended since. Finally, we were supposed to share a queen sized bed at her brother's house over Christmas, but she took the super uncomfortable armchair instead, because she didn't seem comfortable with the idea of sharing a bed with me. Any thoughts on whether or not she likes me? I only ask because everyone wants to know when someone likes them, even if it not reciprocated.