In the course of over 30 years I have seen two therapists before the two I see now. The two past therapists (one of whom I only saw for a couple of months) both had post therapy client friends. As far as I know (and several of those were in the GLBT community with me) there was not a problem or if there was - it was not an overwhelming usual problem. (I only became friends with one of them, I thought the other was bat **** crazy but not because of her post therapy friendships)

The two I see now have both said they do not befriend ex clients.

Although I don't get the strong pull to be friends with therapists one has seen, I don't think it is that big of a deal either.