Did I arouse him without knowing it just by the look of his body language?

My bf and I were sitting on a bench and I had my hands placed on his thigh. I was rubbing his thighs up and down without realizing it, weird huh? I think I was dazing off while doing it. When I faced him, I saw him that he wasnt facing me but down at his thighs, and I saw that my hand was rubbing up and down his thighs and he had liek that uncomfortable feeling. Did I arouse him?