The Appointments of Dennis Jennings (1988)

Dennis Jennings is an introverted daydreamer, sleepwalking through life. He is a professional waiter and has an equally-dull girlfriend, Emma. In an attempt to release his pent-up feelings of isolation, he begins seeing a psychiatrist, only to discover that the doctor is somewhat less than interested in what he has to say. After finding his doctor sharing his intimate secrets with a group of fellow psychiatrists at a bar, he then learns the doctor has a another more unprofessional involvement in his life.