Peter's used to Alec getting angry at him. A few months ago, it might have upset him to have Alec raising his voice at him, but he kinda understands why he'd be upset. Peter had done a lot of thinking on this ever since Quill had showed up and come to his conclusions on his own.

"It makes sense if you think of this as a second life and you think of leaving as dying," he says. "We probably won't remember anything when we die either, but I don't think the things we do while we're alive are useless because we die and won't remember them afterwards."