This is so hard. You are going to get a lot of support and advice about this here. I can only say that I have been in your position, and leaving my t was simply out of the question. Fortunately, my t was willing to do distance therapy with me. We started out talking on the phone, and then moved to Skype. It was not perfect- I miss being in a room with her- and I know many people here who wouldn't even consider it. However, it worked well for me and I was touched that my t was open to staying with me.

I recently started seeing new local t, but if it doesn't work out with her, I know my old t is just a phone call away.