> That will hurt her, of course, but so what? If she wasn't dating you, she'd be dating somebody else, who, statistically speaking, would also end the relationship, and would also cause her that breakup pain that we all feel more times than we would like to. So she's not getting more pain, just the same pain everybody else gets.

No-one capable of that level of cynicism should be in a relationship with anyone.

Just FTR, it's not ok to hurt someone because someone else would probably hurt them if you didn't.