It will only get better if he chooses to get help and stay clean.
There are places like Al-anon for family members and friends of users that, if he chooses recovery, will help you as well.
It’s hard to be the partner of an addict, and I can only imagine there are times when it is difficult to be the partner of a recovering addict, as you don’t always know the best way to help them, and sometimes you need someone to talk to about what’s going on also.
I have the same thoughts about my partners drug and alcohol use, is he cheating on me, if I leave will he bring home other women while I’m gone.
Why aren’t I good enough to stop using for.
Unfortunately you have to put YOU first and they have to put themselves first before the recovery can work.
L