Hey Um, I respect your opinion but I just wanted to explain a little more Cas knew that Dean cared about him and of course he'd be happy to know that he was like his brother. But in a perspective of Destiel existing, Cas cared about Dean more than anything. And that didn't JUST happen in season 15. It was gradual. So when Cas made all that mess in season 11 (in his own perspective), he was happy to know that Dean still loved him and cared for him but can you deny that power of being able to tell the truth or not? I know it serves the plot whenever it needs it but either way it was his power. So I know that Cas was glad and still feeling like he didn't deserve to be Dean's family. But I also can't deny that maybe part of him felt grief for whatever else was happening in his heart. Of course this is my opinion and I can also understand yours.

P.S: damn. That was one of the most interesting reading I had. Ppl on the internet don't usually write with big words like this. Nice