There are a few issues here that need to be approached.
The first of these is communication - in order for things to improve, your husband needs to understand with total clarity what his behavior is causing you to feel. No gentle hints here - right on the chin. It must NOT be done in an aggressive way, but firmly, and not in a blaming way. It's important to separate the behavior from the person. Make sure he understands that while you love him, his recent actions and unwillingness to talk about your issues is very hurtful, and is putting the long term future of your relationship at risk
We humans only indulge in behaviour that brings reward of some kind. Only when that reward (whatever it might be) disappears, or the consequences of our behaviour promise to be unpleasant do we consider changing what we do. Therefore, you have to give him reason to change
Here is the clue to sorting things out. When you are faced with non-co-operation – give him choices, and make sure he understands the consequences of his choice – and always follow through. It may well be that some joint therapy would help, allowing you both to air your problems in front of someone who is outside the situation and who has no particular axe to grind. I suggest you consider this, and offer it to him as an option
I think you also need to make it very clear, and commit yourself to this, that in talking over your mutual problems, you will not let the discussion deteriorate into a blame and accusation session – that is vitally important. It is equally important that he understands why you need to talk, and that what you want is a good relationship, not just to hash over your differences.
Stay calm, remain objective and avoid drama, but stick to your guns.
As to what you can expect, this is a question we are often asked here, and which none of us can answer with any certainty, because individual responses to situations are quite unpredictable.
What I will say is this. He is probably feeling anxious and vulnerable, and what he needs right now is tough love. Love and reassurance yes, but on condition that he does his part in resolving the problems in your marriage.