"Oh, Cas," Sam said, her voice coming out as a sigh of sympathy. "I'm sorry."
God, she knew that feeling all too well. The determination to do the right thing even at a high cost-- because going back to heaven would surely cost him, especially after all of what he'd described, and he would be leaving his friends on Earth behind for good-- and then being totally blindsided by finding out that the plan had, in fact, gone the exact opposite way it had been intended. She was sorry that he had to know what that was like. Sorry that he also had to find out what being human was like, when he hadn't wanted to be. Or at least, she assumed that he hadn't wanted it, and certainly hadn't wanted it like this.
She let out a breath and gave him a slight smile. "For what it's worth, I'm not going to hold any of that against you. Not that that'll stop you from beating yourself up over it, especially now that you've probably got a whole lot more human emotion to contend with-- but you should try to forgive yourself, too. And I should take my own advice," she said wryly. And finally, she lifted a bite of her nearly forgotten salad to her mouth.