Very, very nice. I'm not that massive a fan of Wormtail (Padfoot, Padfoot! O where art thou, Padfoot ) but this was nice. especially the epithets he hands out (Sirius-who-is-insane, James-Prongs-The-Leader et al). It would be how he thought of them. Even McGonnagall didn't have a very high view of him. I like that he feels some regret, but can't get over it enough to redeem himself. Makes him more human somehow.
I loved it. It was an interesting veiw of wormtail, and I like how you made him feel regret but not too much of it... and that makes no sense...
what im trying to say is that what you wrote was lovely. simply genius.
Wow. What a wonderful, poignant look into the mind of (in my opinion) one of the most interesting characters in the series. I love your use of repetition. The thoughts seem very in character too.