The Sentinels Please believe me don't you see the things you mean to me

it occurred to him that she was about to leave -- he tried to muster the words to make her stay, but as soon as Aria stumbled through her emotional monologue, she ran away, a pale ribbon of angst. Cas sighed heavily, cursed himself in his head, and slumped over to lie dramatically on his side, unable to move as sadness crept into every facet of his being. 

not until the snow began to fall, that was; then he picked himself up and plodded wearily in the direction of eilidh's den.