I use the same tactics therapist use on clients on my personal training clients to get them addicted to me as a personal trainer and it works. I have had clients for years.

#1 Rule: Make them feel they are the most important thing in the world at that moment. Everything is about them. It makes them feel good as most the time they do not get that anywhere else.
#2 Mimic their behavior and even things they like can be food, activities (not a T thing but a connection thing)
#3 Keep yourself just out of reach as they want to be your friend and go out to dinner or a movie. Keep the distance.
#4 Always look them in the eye and give as much compassion and empathy for what ever trivial mundane issue they think they have.