That hunched posture, the hands shoved in the pockets, Sirius knew Remus and he knew what that all meant. He wanted to just pull his friend into a hug and promise him it would all be okay. But that wasn't his place anymore. Regulus wouldn't like it. He was going to have to try not to be so damn affectionate.
"In what world?" Sirius asked quietly. "In thiss one, you daft sod. I always, I would have..." Fifth year. Fuck. "I just never thought you, I never thought anyone could ever look at me and see more than..." He shook his head. His defenses were slipping, and none of this mattered anymore. Whatever chance they might have had was gone now. The one time he'd been cautious, hadn't pushed, and look where it got him. Fucking typical. He locked those thoughts away too. He would examine them never.
"Anyway. It doesn't matter anymore. I am happy about Regulus. Just because he doesn't like me doesn't mean I don't like him. So."
Sirius found himself moving forward against his will as Remus talked about his life. He ached to just hold him, but settled for a hand just barely touching his shoulder.
"Moony? There isn't anything, not anything, in this whole damn world that could ever make me think less of you. Nothing. Okay? You are not less. Not less than anyone, and you don't get to talk about my best friend like that. If you want to tell me, to talk about it, I'm always here. I am the last person who would ever judge you Moony. But if you don't want to that's fine too. Just, whatever you need. Okay? And this thing, with Regulus, I won't make this weird. I'll stay out of it. Promise."