"Because I can't. I cant even save my own brother. The world is falling apart at the seams and no matter what I do, the Horsemen are gathering...the Devil is gunning for me and my brother. How is anyone suppose to be able to save themselves when they have all of that on their shoulders?"
The pressure Dean had on him had been building for months. Especially after Jo and Ellen died.
No matter how hard he was fighting, deep down he knew he would be saying yes, just as Sam would.
The world was going to end, but he would go down fighting.