I was a bully [I Was Bullied]

I was a bully at school and bullied one person for a couple of years. Apparently I made his life a nightmare he told a girl I was dating (they were both in the year below me.) I came home from university at Christmas last year and saw him, he’d started going to the gym, he literally picked me up and threw me in a huge pile of mud. All his friends cheered and clapped as I got up, covered. I can’t stand them. I cried for days afterwards, I was so upset. Do you think he was right?