Codependent relationships are often described as being marked by intimacy problems, dependency, control (including caretaking), denial, dysfunctional communication and boundaries, and high reactivity. There may be imbalance within the relationship, where one person is abusive or in control or supports or enables another person's addiction, poor mental health, immaturity, irresponsibility, or under-achievement.
Under this conception of codependency, the codependent person's sense of purpose within a relationship is based on making extreme sacrifices to satisfy their partner's needs. Codependent relationships signify a degree of unhealthy "clinginess" and needy behavior, where one person does not have self-sufficiency or autonomy. One or both parties depend on their loved one for fulfillment. The mood and emotions of the codependent are often determined by how they think other individuals perceive them (especially loved ones). This perception is self-inflicted and often leads to clingy, needy behavior which can hurt the health of the relationship.
Addressing codependency in one's life can be very freeing and is the key for many in establishing and defining a healthy relationship with self and others.