I don't want to apologize. Do I have to?
Why would you refuse to apologize?
Because I don't care about the person who asked me to apologize to begin with.
Well then what do you gain by not apologizing? Better to just get it over with than start a big problem over nothing.
I enjoy toying with people and I know that they will bring the issue up again. It's like a game to me.
Refusing to apologize because you want to toy with someone is cruel and rude. Even if you don't like them, you should still apologize to them because you did something that upset them. The sooner you apologize, the sooner you both can move past this.