Dean looked down at the ground. He couldn't bear to stare into those deep blue, expecting eyes. Cas had always trusted him, always believed in him, but now it was too late. No matter what Dean did, they'd always end up there; they'd always end up beaten and broken and dead. Both inside and out. And now that he knew he couldn't help the friend that had always been by his side, Dean felt lost and confused. Had he believed in some higher power, he would've called for help, but he knew no one was listening. And that he was alone, holding all the responsibility on his shoulders: all the lies, all the secrets... In fear of letting down those he loved the most. There was no way to get the angels back to heaven, but Cas couldn't find out about it, not yet anyway. Cas was just getting used to being human, and he was coping so well. No, Dean couldn't tell him because he would destroy any hope the fallen angel had left, which wasn't much to begin with.