Does he have an ?

Me and a boy that i like recently got seated next to each other in science cl. The other day we were watching this video and we were laughing, joking, and talking with each other. then about half way through the cl period he sorta stopped talking to me and he looked awkward. He had his sweatshirt over his groin area, and was sorta slouching under the table. then he had his hands "down there", i think in his pockets and almost looked as if he was rubbing "it". I went to the bathroom just in case, to give him some space or time to "work it out" and when i came back he looked less nervous but still didn't talk to me or look at me the rest of the period. Did he get an ? If so was it my fault? Does that mean he likes me back?(im a girl)