I think Dean and Cas should be canon because their bond is profound in the most literal sense. Dean has always been physically inclined but never emotionally, but with Cas he's felt anger, friendship, betrayal, understanding, etc. Anyone else he would just let slip away, but Cas is someone who has seen the full spectrum of him before getting physically intimate. Plus, Cas fell for him, comes when he calls, basically everything in 8.02. Cas went from loving God to loving the righteous. <3
I swear you will make me cry in one of your asks. I absolutely agree with you and YES to you saying than now, Cas loves Dean instead of loving God. It explains a lot about their relationship.
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