Sweet revenge for a boy?

there's this guy, eoin, in my class at school. He said something offensive and stupid about me in my face, so i tapped him on the head. then he walked away and when i wasn't expecting it, he went behind me and punched me across the face. Btw. i'm 10. I got a black eye, put of course, i didn't tell on him, because im not a rat. so any revenge plans that won't hurt him or embarras him, but still revenge him? and a revenge plan where he won't tell on me, because he will tell if i do something risky, he's a boy.