I'm going to fight in school tomorrow how to confront this person?

[Kenny]

This boy keep talking a lot of crap about me, made rumors about me on twitter and on facebook. He always embarrassing me in class, in lunch, anywhere in the school. People always come to me and they tell me what this boy be saying about me. It's been going on for 4 weeks and I had enough, I did tell the teacher but they no help so I gotta take it to my own two fists. Don't tell me violence isn't the answer in middle school the same thing happen to me and I had to fight him so he will shut up!

I'm planning to confront him in front of his friends in math class after I finish my work. I will come up to him and say "If you got something to say, say it to my face like a real man instead of a punk a$$ b&tch" I know he will not back down and we just fight from there. Any advice how to confront this person!?
I haven't got into detail what he said about me but just know that he said a lot of mean, nasty, hateful things.