OR ask him to sleep over, put your cock in his mouth, take pictures and post them over the internet and adverise the site in your school/work/social place.
If that fails tell him your sorry, invite him back round to yours and for him to stay there, put sleeping pills in his drink, poke a condom up his arse, leave it half hanging out and wait for him to wake up and ask him if he enjoyed the ammount of sex you had lastnight.
You won't have any friends to hate ever again. :)