No, he hadn't done that, because Sirius would never talk about uncomfortable subjects, but the fact that he wasn't arguing was worrying. "When did you get so accepting?" he asked, a little worried. "Never mind that."
He flickered his wand, and turned the chairs into a sofa and the table into a coffee table. "Sit," he said, waiting for his brother to take a seat before joining him. "You're not unstable. You're Sirius Black. You are better than everyone. Except me obviously."
He wasn't one for physical displays of affections, especially with Sirius, but he put a hand on his shoulder. "I care, because these people who took you away from me never deserved you and they certainly didn't understand you, but you're right, we can't change it. What we can do is have a life here. You and I can have what we never got back home. I just need you to stick around a little bit, long enough for you to feel better, for the effects of the Dementors to be gone, because no way they are gone, not if you were in there for years. Can you please, for once in your life, listen to me?"