I really need tips on how to get back on my ex boyfriend?

I had been seeming my ex boyfriend on an off for the passed two years I had finaly broke it off in October of 08 but through out our relationship he had became very and beyond obsessive with me I had to go up to my second floor in my building one night (this was when he didn't even bother to see me for three days) and there was banging yelling screaming so I went up there to complain and my ex lives in the same building of me he was running down the hall way cause he lived in the scond floor of me also so that's how he knew I went up there. So I went inside so no drama would start for two hours he was banging, yelling, screaming and kicking the door as hard as he could forcing himself in side cusing them down when he finaly got in he took the first guy down that he saw cause he thought he was into me and yet his gf was there with him I came home went to bed fell asleep next thing I knew it he took whatever he could find off my computer desk and started chucking them at me grabbed my pillow and started wacking it at me I saw that he took off my screen opened up my window to do this. If I went to go see a gf of mine that I've known sinse high school he either made up a reason to come a long everytime oh said I cheated on him on my gf. He went after a good guy friend of mine that I have known for five years cause he saw him dropping me early in the morning cause he wasn't going to drive me home drunk and said that's not a good enough reason to have spent the night at his place. Cops have told him to stay away from me to not ever go near or talk to her again but he still kept calling and coming over he has broken in to my place yelling and screaming at all hours of the night waking my son up my mom and a few people who also live on the ground floor now that I'm done with him after over a year he still calls me slut, whore, ***** even the C word if I'm out in front of my building playing with my son or he's playing with other kids he will yell STFU you dumb whore get the hell away from my front of the building in front of my kid this dude is 30 years old never moved out of his parents place no job and sleeps all the time and he is still coming down and calling me asking for me back but cops won't do anything he spilt one of his friends head open last year cause his friend was talking to me and we were broken up I am sorry this is soo long but I really need help especially that I have a child and the things he calls me in front of my kid it's disgusting and like I said cops won't do anything even though I had once called the cops on him four time in three weeks and they just said I was doing this cause I was mad at my bf even though I showed them proff that he had called me over fourty times in five minutes. Please please PLEEEEASE help me I need this to stop I need the best revenge possibly ever thought of or ever done to someone thank you soo much %26lt;3