Hi itjustis,

I don't really have any experience with this, but I do understand that this must be a hard time. Change is never easy, I suppose.

I think that I would see it as a very long break. Trying to focus on the things you normally do in between sessions and the work you did that brought you the progress you've made so far.
I think that for me, personally, the thing that helped me the most in therapy is some kind of accountability. Having a T who'd expect things from me and who'd push me to always improve and work on myself. So I think it could be helpful to find someone besides your T who could do this for you. Someone you can talk to and who can help you reach your goals. Maybe a kind of 'mentor', someone you think you can learn something from.

One question though: is it really not possible to continue with your T and to work on this a bit more before you 'take off'? It seems like you could benefit from that as you don't seem to feel ready for this yet.

Anyway, I'd encourage you to see it for what it is and trying not to ignore it. So that you can make the most out of these last couple of sessions, while working on some closure. I know it will be difficult though.
And, if possible, maybe you could talk to your T about maybe being allowed to contact your T after your sessions are due. Even if it's just a short email from time to time. Do you think it would be an option? I guess it could give you a more secure feeling for a while, until you move on to something else.

Wishing you the best of luck!