"Fine. You had to go. Great. Whatever." he said, exasperated. This conversation was obviously going nowhere and so he didn't want to have it anymore. Not that he'd particularly wanted to have it in the first place.
He was being a prat? At least he wasn't forcing other people to talk about things they didn't want to talk about. Honestly, he knew he was being unreasonable and a bit of a prat but he wasn't about to admit to it. 'Sorry." he snapped back insincerely.