You could act like you're life is better without him. If that doesn't work, if he has a car, you can put sugar in his tank and it effs up his whole car.
Does he have a car? If he does get a ton of pads and tampons and sticks them all over his car and then squirt ketchup all over them hahahaha a person I know did this and it was great
Move on & be happy. Make them see that you're above it, that you're not gonna put up with it, and that you know you deserve better. Find someone that treats you right. Make them see what they're missing. That's the best form of revenge.
it will KILL him inside, trust me.
good luck:D