Sunshine, your t has already told you that he would work out sliding scale with you if need be, and if you are committed to the therapy. I would trust him on that one. I would also tell him about my fear of hime reducing the sessions to once weekly.
If I was in your sich I'd say something like, ''I am gaining a lot here, I so appreciate your expertise. You had once mentioned to me that when my insurance runs out and I'm unable to pay you'd work out a sliding scale fee. I have been afraid to bring it up for fear that you would cut my sessions to once a week. However, I feel that I need the support of twice weekly, and yet it is so hard for me to swing it financially. Are you able to work out a financial arrangement without cutting down on my sessions?"
When I felt the need for twice a week I told my t that I feel I need to see her more often and would she be able to make it financially possible for me?
Let us know what happens.
Take care,