The evolution of Destiel
Castiel: Sorry but Dean you have to sacrifice yourself for the greater good. Duty before emotions.
Dean: Screw you. Lusty eye fucking and dick jokes.
Cas: I won’t let you sacrifice yourself, you mean too much to me, to everything, I love you, I love all of you, I will sacrifice myself for you and I won’t regret it, I’m doing this for you, you are my Human Weakness….
Dean: trusts him to find Sam, just wants him to stay with him, married bickering and constant worrying for Cas, romantic gifting, not caring what it sounds like when he tells Sam that Cas came to his room, played him and took the colt from under his pillow, defending Cas even when he is hurt by him, devastated at his loss…