I'm trying to do the same to my ex >=) You should just make it obvious that you've moved on and that you're happy with your new life without him. Make him realize what he's missing out on, and that him breaking up with you was the worst decision of his life. Try saying things that remind him of what you once had. Don't say them directly though, if you have a social networking site then you may wanna put some of these things there so he can see them. For example if you're friends on Facebook. You can also have a mutual friend constantly reminding him that what he did was stupid, and that you're a great girl. This will make him feel like a total ass because the loss of you is really sinking in =) Have fun girl, I hope this helped.
Make yourself extra pretty, put on a smile (as if to let him know you're happy his a$$ is gone) and be seen in the arms of a really good looking stud. Make out with him in public, too. Then get into his rich sports car and drive off, flipping off your ex-boyfriend while driving off saying, "My new man has a bigger weiner than you!"
Just ignore him and move on. If your trying to torture him a little you clearly aren't over him and the power is still with him. If he is over you then anything you do try will mostly look desperate and weak. If anything it will make him regret breaking up with you less. Just date other guys not because you want to make him jealous but because their are other guys out their who can make you feel happy. Once you really are over him and feeling good about yourself he'll probably miss you but don't exhaust your energy trying to get back at him. The only time people miss their ex partners is when they see the person they fell for in the first place. Not the angry, spiteful person looking for revenge!
I think that this is a normal feeling. I felt the same way when my boyfriend and I broke up. He was a douche and even though I broke up with him, I felt like he deserved to hurt as much as I did. It doesn't really help in the end. :\
If you feel this way, it also means you aren't quite ready to be friends with him, so if he's asking to be friends the best thing you can do is ignore him (if you want to bug him just a LITTLE.) If you change your mind about hurting him, and he wants to be friends, just tell him you need some time.
move on, for real. just move on, and pretend like it didn't even bother you, once he sees that you're happy and your breakup didn't even affect you, he'll be so mad.
haha, at least that's what happened with my ex, I moved on pretty quickly and he got so pissed off that he tried to fight my new boyfriend and did everything he could to get us to break up, but when he didn't, he got so angry that he now does everything possible to avoid seeing us...its kinda funny actually :)