I doubt it is so black and white - from all the friendly engagement in the past and now no interest. I am sure that he found the interactions with you rewarding if he shared so much personal stuff and behaved in a causal way. Probably he realized now that he made a professional mistake and is trying to undo it - I think it is quite common in Ts, there have been many posts about situations like that here on PC. They rarely admit it to the client because that would make their errors very clear. I would also say is you find the therapy with him helpful (not just due to the friend-like interactions), try to focus on the issues you want addressed. If it remains too painful and frustrating even after some time, I would maybe try to find someone else and not get into a similar interactions with them if possible, especially if your therapy goal is to work on phobias, where dissecting the relationship with the T is not really relevant.