It wasn’t love, despite the fact that Cas had just said he was one of the people Dean loved and Dean didn’t contradict him. Or Sam when he said, “We all love you.” Because “all” implies more than two, and the only other person we know who could fit that parameter is Cas. Or the many times Dean has called Cas family.
Yeah, “lalalalalalala shut up I can’t hear you,” is EXCELLENT REBUTTAL, two thumbs up on THAT one. [/sarcasm]
Good Lord indeed.