In the book "American Wife" by Curtis Sittenfeld, the protagonist reflects on a significant aspect of her life, stating that she became her own confidant long ago. This suggests a theme of self-reliance and personal introspection, indicating that she has learned to trust and understand herself above all else. This journey toward self-discovery highlights the importance of inner strength and self-reflection, as she navigates her experiences and relationships.

Her evolution into her own confidant also underscores the complexities of her life as she balances public roles and private feelings. By relying on herself, she gains insight and clarity that may not be available from others. This statement encapsulates the essence of her character, focusing on her ability to manage the intricacies of her life through self-acceptance and personal growth.