Sorry you are having a difficult time - as you know, after these times we often move forward.
Just read a great book which suggests that the Five Stages of Grief may not be helpful - that some hurts we learn to live with rather than 'get over' It made a lot of sense - sometimes we feel guilty because we don't feel OK.
The journey is hard and the road is long and winding. Take heart my old friend, you are an inspiration to everyone you come into contact with, as like St Francis, you seek to love, not to be loved. Your husband is truly crazy to have left a treasure like you, and a double idiot not to take good care of you.