"My best friend's boyfriend is cheating on her. With me. It started off by accident, but now we're doing it all the time. It's amazing. He's refusing to tell her, but I feel so guilty. Thing is, he doesn't want to leave her, so I really don't want to lose them both by telling her myself. Am I a terrible person?"
You're a great person if your friend enjoys having her insides shredded by someone she trusts deeply.
