A/N: I like to write drabbles, so I'm making a collection of all my little Supernatural drabbles that I write because it looks lame when you upload them all separately. The title is in reference to that line that Dean said and to the fact that these will all (or almost all) be angsty. This specific one was written for a request on tumblr. Warning: Death.

Disclaimer: I do not own Supernatural.

Dead Promises

Cas had realized the last time the Winchesters had come back from the dead that that was it. Their last chance. Everyone had to die - really die - sometime. The Winchester brothers couldn't just keep going on forever - it wasn't right and eventually, they would hate him for keeping them alive. So he swore to himself that the next time, that was it. The next time they died, it would be permanent. A real and lasting peace. He'd just have to keep them safe so that didn't happen for a long time, he told himself.

Cas knew that was practically an impossible task, but he never believed he would fail this badly.

He thought maybe he would lose Dean to a demon attack or a vengeful spirit or, in the best case scenario, old age.

Cas never thought he'd lose Dean to something so close to home.

He never thought he'd lose Dean to Dean's own depression, hopelessness, and self loathing.

The sight of Dean's lifeless body sent a chill though Cas.

The sight of Dean's shattered and bloody skull caused him to stumble as he walked forward.

The sight of the agent of destruction - Dean's favorite gun - in Dean's own hand made his eyes fill with tears as he looked down at it.

But those tears were never shed and no other emotion could be seen on Cas' face. Perhaps it was because the dead can feel no emotions. For, you know, when Dean had pulled the trigger on himself, he had killed two.

I can fix this, Cas thought, trying to fight against the darkness that was engulfing him. It doesn't have to end this way.

But it did. Because he promised.

A/N: Hope you enjoyed it! Or ... not really enjoyed it but ... you know what I mean. Let me know what you thought! And if you want me to post anymore of these. I'd be happy to take requests of any kind for Supernatural drabbles (or one/two shots).