Congrats on taking this step, LittleMouse!
I think it's completely normal that you feel anxious about this step. I know I would! Just remember that you can always ask for extra help if and when you need it. There's no shame in that. I suspect that you'll find you don't need to see him as often as you get better and better, but of course you'd miss him. How could you not? After all, we tell our therapists all our secrets and let them in closer than anyone else. They take on a huge role in our lives!
Sidony