"No means no" should also apply to ending relationships.

Speaking from experience with a crazy ex-girlfriend...

If I initiate the breakup, I mean it. No means no. (Why would you fight for someone who no longer wants you?)

No matter how much I loved you, I can end the relationship for any reason, no matter what happened.

And I did. I have mutual respect to end it.

Don't try to beg me, grab my arm when I leave your apartment, or show up at my house. You crazy freak-poop.