Then I’m not sure.
Dean’s face just kills me. He was happy that he had his brother and Cas back, he was like another person this whole episode, because he finally had Cas with him. This was like the first time in a long time he actually looked happy, and then Cas says he wants to stay and that he’s not sure about what he’s doing next. That’s when Dean stops dreaming and realizes that he never gets anything good, nothing ever goes the way he wants, nothing ever goes the way he wants between him and his angel.
