Glad to hear that you are in good spirits. I think it may not be as difficult for you as there are no kids to take care of, not to make light of it.
I found this part the worst, the extra burden, although my ex did not help me out much anyway. I had no money, he didn't help me in that department (until the courts stepped in) but my freedom was worth it.
I think the grief comes from ending it. Now matter how hard it is to live with them, letting go and realizing that our lives together are no more was difficult for me. Loss is loss, whether you know it's the right thing or not.
For now, just enjoy the fact that you are having some peace. Sounds like your husband is not accepting this very well and he won't get it until some time passes.
I hope you keep posting. There are so many smart and caring women here that will support you in this journey, including me:-)

Kate