Identified with oneself, one feels very sorry for one's own situation and even starts to keep accounts. This is how one thinks that so-and-so, what's-his-name, the buddy, the godmother, the neighbor, the boss, the friend, etc., etc., etc., have not paid him as they should despite all his well-known kindnesses, and, bottled up in this, he becomes unbearable and boring for everyone. With such a subject, you practically can't talk because any conversation is sure to end up in his little book of accounts and his much-touted sufferings.