I agree with the suggestions that have already been given to you, especially finding a new therapist. You really need to find a way to value yourself. This man obviously does not value you in the correct way. Change is very difficult, but you might find out that getting a new therapist is the best thing that you have ever done for yourself. It will take away the guilt you are feeling over this relationship and you can move on and perhaps feel a lot better about yourself. We are all stronger than we think we are and I believe that you can do this. Take it one day at a time and really think about how much better you going to feel when you do the right thing.
Keep believing in yourself.
Rainbow