What would you do if suppose you see me coming face to face with my bully Arjun and he insults me and it leading to a big fight?

In my 9th and 10th grade days, Arjun was my no.1 enemy in school as he used to bully me a lot. Often he used to insult me and we used to start fighting at times but he used to end up slapping my face multiple times hard. What would you do if you see me and Arjun fighting that way and him insulting me?