I'm going to skip class with my classmates only to come back after they had all gone
Do you dislike these people? Does it bother you they skipped class and expected you to do so as well?
Yes, I hate these people. It annoys me immensely.
Classmates can be annoying but you shouldn't skip class to be in the clique with them. You can find some better friends, they are around too. Hang out with the smart ones. These friends you have now don't seem to like you very much either to make you feel like you need to get in trouble with them.
Let them hate me, I hate them too. Besides, it is only a semester.
They do not have to like you or you them, but you still need to go to class. Just get in and get out, and do what needs to be done.