Because he nursed a grudge against his friend, that is actually unfounded, and because it was never clarified, he punishes himself indefinitely whenever she comes to view or mind, while she wonders what happened to their...

Those we encounter, are seldom totally good or evil. If so, we choose to have gratitude for their goodness or to bear grudges against their evil. The first rewards oneself. The latter punishes oneself. Do choose...