As to why he behaves as he does, it is impossible to say with any certainty without having seen him. It may be an attempt at control, or it may be that he just has problems facing up to issues that are difficult for him. Try to find out if that is the case, and if so encourage him to seek treatment so that he can talk things out. If that fails, you have to try a different approach.
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 lack of affection are very hurtful, and in fact, are not going to be tolerated.
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. Until you do, ther is no prospect of him changing.
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.
Begging got you nowhere – so it is time for some tough love. Tell him that if he continues to shut you out, there will be consequences – no laundry done for example, no meals cooked and so on. Something that will make him stop and think.
He needs to understand too that his continuing in the way he has may put the entire future of the relationship in danger, and sadly, you need to ask yourself if you want to spend the rest of your life like this.
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.