Did Peter’s betrayal of James and Lily stem simply from fear of Voldemort, or was it partially being treated as the runt of the group by the other Marauders?
Films like The Talented Mr. Ripley show how the relationship between a vain character with everything and an admiring character with nothing, can turn very cold.
From Snape’s memory, we see James and Sirius making fun out of Peter’s adoration of him, while James openly mocks Peter for his lack of intelligence.
Was it JK Rowling’s way of highlighting how things said and done at school could sometimes leave behind powerful lasting legacies and emotional scars?
That Sirius and Remus merely writing James’ actions off as schoolyard high jinks and youthful self-admiration, might not have been how Peter saw it, just as Snape didn’t?
So much of the books is about how school mirrors and feeds into future life.
Perhaps Peter, on leaving Hogwarts formed a different opinion of his friendship with the others with it no longer necessary as a means of surviving the harsh climate of boarding school.
Thanks in advance and forgive me if my memory of The Prisoner of Azkaban is a little hazy over a decade an a half since reading it or if it contradicts or explains any questions I’ve asked.