Do you think now I can defeat him in a fight? Say honestly.

There was a boy named Monish in my class in 5th to 10th grade. He used to bully me in 5th and 6th grade and we often got into fights in 6th grade and he always won. After that he stopped bullying me and often used to stop my enemy Arjun from bullying me. But once in 9th grade again me and Monish got into fight after he saw me hitting one of my junior who was making fun of me calling me a girl. That was a tough fight with both beating each other but he came out on top at last. He was about same height as me but he had a pretty big fat body so he was stronger. But now we are both 20 and adults so who do you think would win?