confidant (n.)

• acquaintance
• admonisher
• adviser
• advocate
• amigo
• backer
• brother
• buttinsky
• confidante
• consultant
• counsel
• counselor
• expert
• familiar
• fellow
• friend
• guide
• instructor
• intimate
• kibitzer
• lover
• mate
• meddler
• mentor
• monitor
• neighbor
• nestor
• partisan
• pickup
• repository
• supporter
• sympathizer
• teacher
• well-wisher