And after watching S04E07 I can say they already are one of my favorite pairings ever, and one of the closest and deepest ones I´ve ever met.
Some tiny things I´d love to say:
• Castiel wanted to talk to Dean with his original voice and his original shape (can I say shape?). He tried twice without success and he didn´t try again because HE DIDN´T WANT TO HURT DEAN. That´s the reason of the vessel, IMHO.
• First time Dean talked to Sam about Castiel, he already used the nickname.
• First time Castiel smiled, he smiled because of one of Dean´s fool jokes.
• After… (two, three?) previous (and tiny) chats, Castiel confessed Dean he had doubts, he opened at him looking fragile for the first time.
After 4 (FOUR) episodes of them together… and just 5/10 scenes… I can say all these. All these is shown to us. Without subtexts or anything, just facts. How can´t they be named as OTP? Impossible. And it´s just the beginning.
I WILL GO DOWN WITH THIS SHIP.