I'm not going to send a classmate the homework
Why are you not going to send the classmate the homework?
He hates me, I don't feel I should have to help him.
If you are tasked with something and agree to it it is best to follow through with the actions. You could be penalized by not passing on the information.
If I get a penalty then it would be worth it.
I get that your classmate might have been a jerk but you should still do what the teacher says. It's not fair to them.