What if I don't care about other people?
That's strange. Do you care about yourself though?
Yes I'm a great person.
Caring about yourself is nice. Caring about others is also, you should show others your caring side. You will be known as a selfish person if you don't care about everyone.
I don't want to care about other people. They are just stupid, I don't see why I should.
Because caring about others helps them care about you. Caring tends to be reciprocal and you not caring about them will cause them to not care about you.