Firstly, let me say how sorry I am that you find yourself in this situation. This was me 8 months ago and I wouldn’t wish it on my worst enemy.
You have a lot to process and ask of yourself and your partner.
If I were you, I would find out if he is willing to try and get sober. Then decide if he does try, do you want to stay?
Consider your own boundaries and stick to them. And talk to someone to share this burden. Addiction (even someone else’s) isolates us and it makes it unbearable.
Trust is a big one, and I don’t have the answer for this one. It’s something I’m still working towards. It’s so easily broken and so hard to rebuild.
I hope this helps. You are not alone