He couldn't sleep all night. He waited a couple of hours after Tony stopped trying to break down the door before leaving the bathroom. He went to the lab and was working in complete silence, struggling not to think about what had happened.
He felt ashamed, above everything. Unintentionally, he began to blame himself. He was the one denying Tony what he obviously wanted. If he hadn't done that... No, he couldn't let the guilt consume him because of Tony's actions.
He spent the day hiding, having even instructed JARVIS not to let Tony enter the lab, alleging that he was working with hazardous materials.
When they met at night, neither of them spoke about what had happened. Tony, as he sometimes did, had drunk so much he couldn't remember anything. And Bruce couldn't even admit to himself what Tony had tried to do.
Had they talked, Tony would know how damaging his behavior was and Bruce would understand what made him drink so much. Had they talked, Tony would have said that a group of people at the event did everything to remember him of each of the deaths that his weapons had caused, and he drank to be able not to think about them.
If only they had talked...