Instead of having sex which could be regarded as possibly based upon improper motivation, it may be advantageous to consider other reasons for sleeping with someone. Be Happy !
Here's a thought. Feign (unless you really are interested???) interest, tie him to the bed, masturbate and tease him without touching. Make sure to get yourself off while doing this, and show him just how much you're enjoying it. At this point he should be just about ready to cum on his own. Call his parents/room mates and invite them over for a reconciliatory gathering. Leave him lying there unable to move, unsatisfied and exposed for the world to see. Leave before anyone shows up but put the door on the latch. I guess you could mix a little flagelation in there too but the frustration and embarrasment should be plenty.
Even though this is revenge, there are some really groovy techniques I can use from here. Yes boys and girls(to those of you that know me)....I finally lost my virginity....