Mouse, I think your T's "we don't know" just meant therapy/becoming comfortable isn't magic that happens automatically and, she can't tell the future. It's a little like if you had asked your fourth grade teacher if you were going to graduate from high school. She hopes so and things might look good (or she wouldn't be working with you), you're "intelligent" enough, etc. but who knows?

Think about what is needed to become someone who dances into therapy, being ever so comfortable being there.

Do little things while you're there. Have you rearranged the chair you sit in before session? Have you ever stood up in the middle of the session for some reason -- to get a kleenex, read the title of a book in the bookcase that has attracted you or look at a figurine/object on the desk or just to stretch? Do a few daring things like that and make the room "yours" to be in as well as your therapist's! Bring something from home that you enjoy and that makes you comfortable? I brought a afghan of my grandmother's once (blankee? :-) wore bedroom slippers to therapy a few times, especially in the winter :-) and had a tiny stuffed bear I felt part of that I gave my therapist to keep for a few weeks, a piece of me (rather than having a piece of her). You have to work from your side, it's not all going to come from what your therapist says to you.