'It hurts that he wants no contact. I know it's the best but wish that was my decision and not him '. I think that that is a really important point Whatnext. As well as all of the other damage he has done, it feels as if he has taken away control from you - you cannot control what he is doing, and it feels as if you have no control over your life at the moment.
When you find things that you can take control of, you will start to feel more yourself. You have had awful things happen to you in the past over which you have also had no control - what he has done is to take you back to those feelings of helplessness, at the most painful times of your life. Previously he was there to help you, but now he has dumped you back there, on your own, with no preparation.
A counsellor would advise you how to cope with the feelings you are dealing with. Was there any bereavement counselling after losing your little ones? Or counselling after the robbery in your flat? Expressing, and having chance again to deal with, the sense of helplessness that those events made you feel at the time, may help you now too. You are not helpless, but you feel so, feel stuck in a rut which is not of your own chosing.
If you can't get counselling posting on MN, and addressing the issues will help you to recover, step by step, in your own time. But it's no use anyone trying to hurry you forward. You have an inner you, who has been very hurt in the past. She needs care and love and hugs - you can do that. You can address the hurt in your past and move forward into a brighter future with your ds.