How do I get over the need for revenge?

Years ago, this guy totally screwed me over, he ruined a heap of things and made me feel terrible. We were together and all that, and he was really horrible. It's kind of scarred a bit, which is not fun to admit. But anyway, years on, I still have a burning desire for revenge, for him to see me happy and to make him feel bad about what he did. I dress up whenever I go near his house in the hope that he'll see me and see that I'm better than I was and all that jazz. But it's just horrible! I hate it! I hate that sometimes when I do something good, I think of him and how he'd be jealous to see that I'd triumphed. Please help me, how do I get over this need for revenge? It's driving me nuts!! I need to move on, but how? This ongoing hatred is horrible!