I broke my friends watch?

when i was play futsal with my friends well this fat friend someone kicked the ball to the goal and he wasnt the keeper and he fisted the ball away he is 13 year old as same with me. so when he fisted the ball away penalty kick right so i told him to not play then he screamed at my face so i pushed him away then he pushed me i pushed his hand away then his watch was split in two i said sorry he was angry and said do u own the school,sorry if my broke its fine and he told me to replace the casio 25dollar watch should i replace it. but i dont think i should