"There is no 'us' to talk about, Marco," Elena said. Her voice didn't shake.

Marco walked into the kitchen, wearing the familiar, sheepish grin he used to dissolve her anger. "I knew you'd come by," he said softly. "I'll put the kettle on. Let's talk about us."

"That’s the mistake," she said. "I didn't come here to negotiate. I came to return the last piece of myself you were holding onto." The Departure

The final line shifts the focus from the partner's flaws to the narrator's own growth.

As she walked toward the door, he called out, "I'll call you tomorrow when you've calmed down!"

"Don't," she said, looking back one last time. "Ya no regreso contigo. Not because I hate you, but because I finally like myself again."