Hang in there. I am sure life has been difficult. But as you said your husband is getting help. You've stayed with him through all the bad times. Don't you want to be around for the good times too? I'm not saying it will be easy or everyday will be a bed of roses. But just knowing you love one another is a big start. Seeing positive changes in him is what you should be looking for as he goes through his therapy or counseling. I know for me, I am doing all this for myself but also for my family. I want to function better and not miss out on my wife and kids and I know I have been up until now. I am trying to change all of that. It is a slow an painful journey - but I feel it is well worth it in the end. I'm not there by any means myself. But one step at a time. That is something positive to look at.
Good luck,