During a session a client stated that she had had it with a co-worker's verbal abuse, had bought a hand gun and was developing a plan to kill him. The therapist, although concerned about confidentiality, called the police who said they would take care of it. The therapist:

did not fulfill his duty to warn because he did not contact the co-worker directly.

Explanation:

The therapist did disclose the threat to the police, but unless efforts to contact the threatened co-worker proved unsuccessful or there was some overriding reason for the therapist to avoid contacting that person directly, the therapist's duty to warn was not fulfilled unless the person in danger was actually warned.

intimacy, passion and commitment are the components of a interpersonal relationship emphasized in the triangular theory of love by robert sternberg.

the triangular theory of love says love can be comprehend as this componest form the vertices of a triangle.  

intimacy relates to feelings such as of closeness and connection;

passion relates the drives that brings people together, as physical attraction.

commitment relates to the being in a long-term relationship.