Emotional dependency disorder has been conceptualized by various authors. De la Villa and Sirvent (2009) describe it as addictive behavior towards interpersonal relationships , characterized by an asymmetrical role and a dependent attitude towards the dependent person; and Castelló (2000) defines it as a persistent pattern of unmet emotional needs that are maladaptively addressed through interaction with other people.

In line with other disorders, emotional dependency lies at one end of a continuum based on an adaptive trait, which in this case is interpersonal attachment. This disorder can negatively affect the quality of life of those who suffer from it, as it can cause a range of interpersonal and psychological problems.