I am so sorry for the pain you are going through... yes, by him moving away pretty much made you lose hope and that’s tough.
What I am always told (by folks on this site and others) is to acknowledge it and allow yourself to grieve, grieve the loss of your hope.
I have to allow myself to grieve over and over again (a little less as time goes on) the loss of my dream of a normal marriage and life without being riddled with alcoholism. It is what it is, move on and be the best for your daughter; but do allow yourself to feel.
Higs to you!