Most Helpful Guy
The feeling you have for revenge is normal and common, but it isn't going to be productive, and it's more likely to make things worse for you.
The best way to let him feel that pain is to focus on making YOU happy, and improve YOUR life in ways that are meaningful to you. Seeing you happy without him is the one thing that more likely than anything to hurt him the way he hurt you, but even if that never happens, YOU will still be happy, and you'll be that much more attractive to other people, who will want to be with you and be happy with you.
Also, karma has a way of catching up to people. Do your own thing, and let the universe take care of punishing this guy. It may not happen right away, but it will happen.1