When I found T1's inconsistent boundaries we're causing me pain and the sessions were leaving me feeling worse than before I started therapy, I decided to take an open ended break from therapy with him and see another T on a short term basis (this was stopdog's suggestion actually) and this was much easier for me to accept than termination. As it happened, after 3 months of seeing T2, I decided that T2 was actually a much better, more consistent, stabilising influence on my life and I actually felt better week to week with the new therapist. I decided to stay with him, and we still continue to discuss my attachment to T1. What was important about the break is that the option was always there to return to T1, and for a long time I believed I would.
This might be a useful option to consider If you want space but can't bear to think of leaving her right now.