'From now on,' Yuuri thought / grumbled to himself, 'Wolfram isn't allowed to say anything in response to me apologizing.'

On the outside, he abruptly stood up, accidentally kicking the chair again a couple inches to the side, and put his hands in his hair. "No, no, that's exactly what I mean! I don't want to keep being a jerk, Wolfram! I always respond like that, don't I? Why do you even bother following me around when I keep acting like that?"