Hi,
Sorry this is happening to you.
My partner chose coke and alcohol over me. I walked and he didn’t even try to stop me. It’s the addiction. Messes with the mind and makes them genuinely believe that they need to lie, manipulate and delude themselves to keep using the substance in question.
My partner thought that because he wasn’t abusing me while he was drunk and high that there was no issue! You can’t argue with an addict, you will not win.
One day he may be ready to actually stop but until it’s his decision I’m afraid you either put up with it or separate. Perhaps that’s the jolt he needs to get well.
Whatever you decide, don’t be alone. Tell people if you can because isolation and secrets won’t help you.