There's a million different cliche sayings he could give him that would apply here. Don't know what you have til it's gone, he thinks, and doesn't say a word, because the pettiness is mostly gone, leaving him just relieved that this isn't as bad as it could have been. Dean adjusts Castiel's jacket over his shoulders, straightening his tie with a crooked smile, and shrugs. The apology helps, but that doesn't mean it doesn't still sting, just a little.

"It was shit for everyone, Cas. But-- thanks."