Hey welcome and thanks for he post. A quick flick through igh here and you will see lots of people in the same boat as you, so first off you are not alone with this.
It seems like you already know that your partner is an addict. What you describe is standard typical addict behaviour, denial, blame, wanting help but not really doing anything about it. One thing I will say is that at least he is getting upset and making some sounds about getting help – many don’t even get that far so it reads like there is part of him that seems to know there is an issue deep down.
From Your perspective there isn’t a great deal you can do other than decide what approach you want to take with this.