I became friends (in real life - not facebook) with the first therapist I ever saw - right after stopping therapy. It was not a big deal, I was not confused nor did I try to use her as a therapist after we became friends and shared a hobby. We saw each other a couple of times a month. It really does not have to be all that complicated or unbalanced. We were not confused about the change and nothing horrible happened. It continued for several years (about 10 I think) until she moved across the country. We still write from time to time. I don't understand why more people don't accept that there are all sorts of ways to be and what might not work with some can work just fine with others.