I'm going to stand up to my rude classmate.
What made you want to stand up to to your rude classmate?
He's been insulting me and I'm tired of it.
I think you're doing the right thing. If your classmate is continually harassing you, something has to be done in a safe way. How are you going to do this?
I have to stand up for myself and showing strength is the best way to take care of it.
That's the spirit! You must show a lot of strength that you are not someone to be pushed around easily. But if things get too heated, I suggest just calling over a teacher.