Where does codependency come from?

Sharon Martin is a psychotherapist, writer, speaker, and media contributor on emotional health and relationships. She specializes in helping people uncover their inherent worth and learn to accept themselves -- imperfections and all! Sharon writes a popular blog called Conquering Codependency for Psychology Today and is the author of The CBT Workbook for Perfectionism: Evidence-Based Skills to Help You Let Go of Self-Criticism, Build Self-Esteem, and Find Balance and several ebooks including Navigating the Codependency Maze.