[Sam recognizes everything for what it is, because he knows his brother well enough to read the discomfort, see the guilt and complex feeling that spirals with regard to Cas and what he, too, became in their 'verse. Sam became the Devil's meat puppet after years of nightmares, Dean became a colder, ruthless leader, and Cas became a depressed junkie who drowned himself in sex and medication.

Yeah, they're a trio alright. Three sad strands, perfectly braided into the world's saddest friendship bracelet.

He sighs softly though his nose, nudges Dean with his shoulder as he collects some things off the desk.]

You came back. He might, too.

... I'd usually just say I don't believe in good things happening, but you're here, so I can't exactly pretend I know who'll come to town. [He's quiet for a moment, and adds:] He taught me meditative yoga, and I flushed a lot of pills when he wasn't looking. Give-take relationship... Never thought I'd ever get to know him, considering I left before we ever really knew each other.