He's been supportive in past, maybe he's just processing it all. I think he'll come back around. And you have your family in major denial, that's a confusing influence on him. And I'm sure he doesn't want you to be sick, ill, bp, suicidal. None of us want this for ourself or our loved one.

But we have it, this is how it is. Try to get in some couples therapy with him.
I'm sure this is a big trigger for you to have your spouse wavering between supportive and not, so be gentle with yourself and him. He's trying to figure it all out just like the rest of us. I'm really hoping he'll come around for you, I think he will.