What did I do wrong in this situation?

(I'm Alyssa) I was sitting next to my crush in cl and I scooted a little bit away from him to talk to my friend.Then he scooted away a bit and then I did again. We seemed to just be pretending to move away from eachother. But then he said, "Oh I guess I should move since Alyssa doesn't seem to want me around her." and then got mad and stopped talking to me for awhile. Later he was normal. I just want to kno what I did wrong. What did i do to make him mad? i dont want to do it again