he wouldnt really be sorry, only sorry that he has been held account for his behaviour.
Or he would say sorry to get back in the house and then you would need to pay for what has happened to him.
The mindset of the kind of men who do this is that they feel that they are entitled to do it - their entire understanding of relationships and women is warped and only concerned with self fullfillment - they will do and say whatever they need to keep in control and keep on top.
It is not a loss of control, as I am guessing he never has attacked his boss, or a stranger, but very much an exertion of control over someone who he feels is not fulfilling their role. In his mind he will feel justified for what he did, will somehow twist it round to being your fault and, if you have gradually been slowly worn down by him, you will probably believe that too. These men manage to find women who are vulnerable to treating them as if they are the word of god.
But its not your fault. It was never your fault. Nobody, no matter WHAT they did, deserves to be treated that way. But he will not see it and he is a damaged person, well beyond any help that could be offered by a supportive partner, possibly well beyond the help offered by a professsional. His entitlement to hurt you in order to control you is deeply ingrained, and that is what makes him dangerous, so Im really glad to hear you have no intention of allowing him back.
But it hurts. Of course it does. And yes, I imagine he has filled your world so that every waking moment was filled by him, and thats why there is a great big gaping hole. And in a high octane relationship all the emotions are huge and overwhelming - even seemingly the 'love' that was shared. But sadly none of it was real and all of it is unhealthy. Your partner shouldnt take up all your brain, so much that you lose yourself and cannot function without them - they should add to and support your own identity.
Try to get through these next few days with as much kindness to yourself as possible, and try to let go of the fantasy that was your relationship with him. You have a few days before anything happens with him, and to be honest, most of that is going to roll on without your input as the police have made their decisions around charging.
Your safety and the wellbeing of your babies is paramount now. NYE gives you the chance to drop a line to any friends you may have let drift during your time with him. Build a support network. And look at doing the freedom programme - in person would be good, buit online is good. Fill the hole with self love. Mums are strong. Eat. Sleep. Breathe. accept help.