I'm going to light my dorm room on fire when classes begin.
Why do you want to light your dorm room on fire when classes begin?
I'm depressed and I don't want to be a college student anymore.
Setting your dorm room on fire because your depressed is dangerous and irresponsible. Someone could be seriously injured and a large amount of damage will be caused to the dorm room and the building. This would be a really irresponsible act.
I don't care. I'm doing it anyways.
Don't you think that there is a better way to deal with your depression than starting your dorm on fire? Your situation could end up worse than it is if you get caught or if people are harmed from what you did. Maybe you should try talking to your school's counselor to try to get help with your depression instead.