After a time look back through your writing and see how you are changing and growing. Write about that too. Find models to give yourself evidence that you can survive this and even grow because of it. Talk to a person who appears to be handling grief well. Read how others have responded to a loved one's death.
Many books are available at book stores.
It will give you courage to understand how someone else handled grief, survived and became stronger of character because of it. Do something nice for someone else who is hurting as soon as you are able. This is the best therapy for those recovering from grief. It takes our mind off ourselves. It helps us realize that all around us are hurting people and many of them are having a more difficult struggle than we are.