Failed relationships happen for many reasons, and the failure of a relationship is often a source of great psychological anguish.
Most people have to work consciously to master the skills necessary to make relationships endure and flourish.
Some evidence suggests that the ability to form a stable relationship starts to form in infancy, in a child's earliest experiences with a caregiver who reliably meets the infant's needs for food, care, warmth, protection, stimulation, and social contact.
Such relationships are not destiny, but they are theorized to establish deeply ingrained patterns of relating to others.
In good relationships, partners try to afford their partner the benefit of the doubt, which creates a sense of being on the same team in life. Yet research reveals they can also lead to mutual satisfaction when they are successful.