Why did my crush say this hurtful thing to me?

So I was in Science class and my crush is in that class. My crush likes me because my guy friends tell me and he also asked me to a dance a few months ago and told me I was pretty. Anyway, when I sat down in my seat, a boy named James sat down next to me like right in my seat as well and put his arm around me. Then my crush came in and while he came in, James took his shirt and tried to put his shirt over my head. My crush then went over to him and did the same thing with his shirt to James to be funny. Next, I was just talking with my guy friend and he tried to taze me because him and another friend just have that joke with me. Then my crush was next to his friend and said, "Olivia, you show off in front of the guys, it's like why try? like get out of the f*cking closet." His friend smirked but he seemed so serious. Next, he said...."soooo you and mike?" (Mike was the kid who tazed me but MIKE HAS A GIRLFRIEND)