You can review your progress together and tell her why you are quitting. I think Ts find it helpful to know that as it gives them information that might help with future clients. Of course, you're under no obligation to help her in that way, but getting closure could help you move on. And it is a chance to tell her thanks for the help she has provided (if you feel that she has been helpful).

I went to therapy for about 9 months with a long break with my first T. I left when I realized she could no longer help me. She did help at first but I exhausted her skill set and needed something different from what she could offer. I think if you don't think your T can help you, then there is no point in staying on. When I left that T, I canceled an appointment in a phone message and just never went back. Very cowardly I guess, but I didn't know when I canceled the appointment that I wouldn't return. My one regret is that I did not go in person to tell her I was quitting. She tried hard with me and we had some success. I wish I had been more gracious and said good-bye and shared some final words with her. So if you go for one last session with your T, griffin, you may avoid the feeling of regret I have for not doing that. But then again, you may never feel that way as I did.

Whatever you decide, good luck!