I don't feel bad for my classmate
Why wouldn't you feel bad for your classmate?
He recently mocked me and I don't like that at all
Being mocked can be painful, I don't blame you for not wanting to spend time with someone who makes fun of you. But, put yourself in their shoes. If they are going through a tough time, being rude in return is only going to make things worse.
I know, I want to hurt him for being so mean to me. I want to make him feel pain.
I don't think you should wish to hurt this person and get back at them. You should try to show empathy and put yourself in his shoes.