Actually, since your relationship has been 1 1/2 years, I would not be so quick and "cold" to your T. You never know when and if you might need T again.

I would schedule an appointment and tell T that you are going to end treatment because you have not been making the progress that you feel you should. But that you appreciate all T's help.

I would not mention you have a new T already. What happens if this new T does not work out? or is a crazy lady? I would wait until you have established a face-to-face connection with new T to have your records sent, etc.

Yes we hire T's but they are a large part of a relationship with us that is much different than other care-givers or MDs.

Just my 2 cents.