Helping with DDoS

Hello guys
So I got a big problem. One guy got my IP address. I contacted my IP provider about that and they said that they can not change my IP because their company does not do that. Now after a couple days of trying I find out what his ip is but I do not want to be like him and start ddosing with no reason. What should I do? If somebody know what to do with his IP i can show you that. Thanks for help