Having that tug of war in your head can sure be time consuming and exhausting I'm sure. It's not all too different for us singletons at times you know. When something comes along that we need to figure out, we, too have different thoughts, pros and cons and feelings at different times as well before we make decisions. They may sound different to a multiple or have different degrees of exhaustion etc, but they can be very similar as well. I said that because I wanted you to know that we all struggle at one time or another in that realm.
Would it be possible for all of you to compromise? How about going every other week to therapy instead of every single week so that you can get some other work done? I think it's important that you still go to therapy. I wonder too if you are looking for some excuses to not go? Could that be possible?
Have you talked with t about this at all? I think if you do, you may get some help from t in making your decision.