You are doing it because you believe in the possibility of a great R together later. It is normal to have doubts, esp when you have had a prolonged period where everything indicates he is finished.
I understand completely your thinking and only you can answer that. I just reread my three threads and that seems to be my underlying theme too.
Early on I assessed this and after overcoming the fears and practical aspects, I decided I wanted my W and my family.Maybe it will take a separation to do that, but best option seemed to work from within.
At times I thought that I was making slight progress. But in reality I don't think so. There were recent signs that ye were making progress too. You can again.
Yes it is very hard to support. And it cannot be supported forever. Nor should it be. I can't see my W loving me fully again, but the thing is 9 years ago when we got married I could not see her not loving me. So feeling can change.That is a fact.
I would just ask you to ask yourself if you have tried everythingand if you have really invested in becoming the best you possible.I know I can be better so I am using this time for that.When I am happy with me and no improvement then I may have to decide otherwise.
I echo what az advised.
Whatever you chose I am proud that you stood up for your M. We will be here for you either way.
Good luck
R 25 years M 14 years S11 & S13 Working on it alone since Oct 2014 M in trouble a lot earlier (~2 years) Feb 2016. 1st R chat in a yr. Next R chat Aug'17 Still together