This is not simple rebellion. Rebellion pushes back; falling away walks forward into the unknown. The Falling Away boy is not angry at the world for being what it is. He is grieving the fact that what the world offered him is not enough — or not honest — or not his. The departure is painful precisely because it involves real love for the things being left behind.
In YA fiction, falling away often looks like a boy questioning his family’s religion, refusing to follow the career path his parents chose, walking away from a friend group that demands conformity, or physically leaving a hometown that has become a cage. What unites these stories is the recognition that growing up sometimes means growing apart — and that the loneliest journey can also be the most necessary one.