A 34-year-old male presents to psychiatry outpatient clinic with a 10-year history of pervasive distrust of others, reluctance to confide in people, and persistent suspicion that others are exploiting or deceiving him. He has had three jobs in the past 5 years due to conflicts with colleagues. He denies hallucinations, delusions, or formal thought disorder. Mental status examination is unremarkable except for guarded affect. He is not in acute distress and denies suicidal ideation. What is the most appropriate next step in management?