Peter wasn't entirely sure what to make of Tony's words. The man wanted him as his best man? He certainly wasn't expecting that, and he wasn't entirely sure what to say about such an honor. He didn't know much about being a groomsman, and he certainly didn't know anything about being a best man. Wasn't there someone else Tony would have preferred? Not that Peter wasn't touched! It was just very surprising. But a good surprising. A warm, fuzzy feeling kind of surprising. Out of all the people he thought Tony could choose, and he had wanted him to be his best man.
He wasn't entirely sure what to say at that moment, so he nodded a little and started walking again. Was thank you the correct response? Or maybe an I'd be delighted? Even if it wasn't happening just yet, even if it never happened, Peter knew he had to say something. But what? What were the right words? This was not something they taught at Midtown. There was no class in high school on these types of real world scenarios. He knew real world prep classes existed, but he doubted they included how to respond when someone tells you something like what Tony told him. Maybe they had special classes for that, though? Maybe Goodland had such things? Not that he expected to be in a lot of weddings. And he always assumed if he were invited to any weddings in the future it'd be, you know, in the future. When he was older.
Gathering his thoughts and swallowing, Peter glanced over at Tony and said, "I'd've said yes." Because he would have. Among other words, no doubt. "I don't know what a best man does, but I'd've said yes. It'd be an honor." And would have required a bit of research to figure out if there were special duties that differed from just being a groomsman. "I-I'm not sure what else to say," he added with a little sheepish laugh. "Thank you? Is that appropriate? Thank you for the honor, Tony."