Aching in the Absence of You
Brittle and battle-worn, Cas looks at him over coffee one morning and says, "I need to go," and Dean instantly knows that he's not coming back.
He's not really sure how he knows it, but he does. It settles into the pit of his stomach, curling hot and tight like something he instinctively wants to tear out with his bare hands. He takes a breath, and it gets stuck in his throat, hitching there. It hurts, hurts, hurts when he finally exhales.
"Yeah," Dean says, "of course you do," and he nods jerkily as he looks down at his phone. He doesn't say goodbye. He doesn't look up from the screen when Cas gets up and leaves the room. He doesn't finish his coffee, or move for a long time.
By nightfall, Cas is gone.