He is dumb and shouldn't be allowed to wear pants. I am going to alter them so he can't wear them.
That is not nice! Why would you think of doing such a thing?
I want to make him angry because he is so picky.
It is wrong to try and harm someone mentally because you are angry at them. You should leave peoples clothing alone or alter it to their specifications.
He thinks he's so perfect. I'm just trying to be cute but he gets so mad.
It sounds like your jealous. If you want to be better, then you need to put in the work, not bring other people down.