Friend problems!!!?

Well it started as me and this kid being like best friends. Well in cl me and this other kid were talking about skateboarding, so my best friend said oh look adam and devin are best friends know and I just like ignored him. So me and devin are walking down the hall and are still talking about skateboarding when i pinch him ( we always do it to eachother for fun) hes like down ******* touch me. He has never been mean to me or anything and do you think he is jealous that I was talkin to another student? hes y and makes fun of everybody but me. so what should i do?