"Hi Remus," Peter said quietly, giving him a little wave and staying put; not for him, attempting to fling himself into the werewolf's arms. It was weird not to go out with Remus on the full moon now, and weirder still to think of who Moony had actually been with, but mostly Peter still felt bad about the whole Order...thing.
Oh, sure, he blamed the hell out of James and Sirius and their trigger-happy failed alibi-ing, but jumping in probably hadn't helped.
"There's some warm pizza over there," he said, pointing to one of the boxes in the hope that this would cheer Remus up just a tiny bit.