Dying* and it depends mostly on how.

Demon attack: "Get up, sister. I'm finding a way to get you out of this, Winchester style. You're not dying on me today. You can't- I love you too much."

A sad and tragic way: "I know we don't have long so I'll make this short: I love you babe, keep your hats low and feelings in check or else they'll start to fight, and always, ALWAYS listen to Fall Out Boy in heaven. Or wherever you want to go after this. You improve my life by infinity. Okay? Okay. Just know that you're not really leaving me, I'll remember that. I promise."

All-encompassing way: "Nope. Definitely not. Get up, I'll get you out of here, and I'll murder anyone who stops me."