You never got along with the Winchesters (Dean and Sam), you were rivals. none of you tried to hide how much you hated each other. It'd been 9 months since the Winchesters last saw you. The Winchesters (including Castiel. you and Castiel always tolerated each other) walk into a bar and just as they sit down, Sam glances around the bar and sees you, he quickly taps Dean and Cas then points to you discreetly, silently making your presence known by Cas and Dean.