Hello BottleBlond,
Welcome to SR!
I would make a relapse plan with your H. What your role will be if he relapses. More importantly, what his relapse prevention work will be and what he will do if he relapses. Then, it's all laid out for both parties. I'd even sign it.
I'd also make standing appts with your counselor. You're going to need an outlet. Good Luck!