How do i get rid of this guilt?

my spring break just ended and it was the first day of school, I was really cranky, and we were playing hockey which i ussualy act lazy so i wouldnt have to do anything. I really wanted to get even with the dude who made fun of me at basketball for not being able to make any shots. So i started stealing the puck from him everytime and he got pissed and started pushing me, So i pushed back and he fell and cried, i was really suprised that he cried. Then some dude started calling him a crybaby. it felt good after awhile, but now i just feel like a jerk.