I don't think we, as a fandom, talk enough about the trauma that Sirius most definitely had after escaping Askaban. This man spent twelve years in a place designed to break people's minds and spirits knowing that the people he loves and are still alive (Remus and Harry) think him a cold blooded killer who betrayed his most beloved friends. Remus wanting to keep a distance in Grimmauld Place cause god he can't do this all again it's just too painful, watching the man he lov-used to love more than anyone else slowly fall apart from his nightmare and his lack of sleep. The little stares when Sirus would start trembling after Molly raised her voice or the time he had a panic attack and started shouting, "NO PLEASE STAY AWAY" cause the lights went out. Until one night he was waking outside Sirius room and just heard him yelling screams of pure anguish begging for someone to let him go and he just wordlessly curled up in the bed with him and hugged him until he felt Sirius breaths calming down and his eyes slowly close