In my profession, it is considered an ethical violation for a therapist to have a "dual relationship" with a client, a breach so significant that it can result in action against one's license to practice. Even accepting a social media friend request from a client is considered to fall outside of the scope of a professional relationship and therefore as being unethical. A professional relationship is a one-direction relationship while friendships are two directional. We can be friendly, kind, compassionate, and supportive to those we serve, but that doesn't mean we're having coffee with each other Saturday morning or going to the matinee Saturday afternoon. And, it doesn't mean I will be talking to you about my problems in the same manner you talk to me about yours. That's the difference between staying in a professional role and being friends.