Again, remind Sam why he hadn't just gone to bed instead of saying words? He could've slept. And then tomorrow he could've carried on as though everything was fine. He could've forced a smile and hunted some monsters. But no. Mr In-tune-with-his-emotions had had to open his mouth and now they had to talk and fight and try not to blow each other's brains out.
Maybe he could crawl into bed while Dean was gone and be asleep by the time Dean got back and avoid the talk they both dreaded. Or not.
It was going to be a long night. A very long night indeed.