Codependency Treatment in Center City Philadelphia: Codependency, also known as relationship addiction: Treatment for codependency is available in Center City, Philadelphia. The concept of a relationship addiction has only become popularized in the last ten years. The term was originally coined to describe the partner of a drug or alcohol addict. Codependency is a disease that is thought of as a learned behavior, typically passed down from one generation to the next. People who are codependent typically engage in one-sided, unhealthy and / or abusive relationships. Below you'll find self-help tips provided by the therapists at The Center for Growth for those struggling with codependency.