Let it out. A truly horrible thing has just happened to you. The loss of a spouse, lover, child, parent or close friend is a real reason to be angry. You may be very angry at the deceased for dying. This is normal.
Forgiveness plays an important part in grief.
You may need to forgive him or her for dying and leaving you. You may need to forgive yourself for all the things you could have done or would have done differently. Grieving is a way of letting go of what might have been or should have been. These memories may make this time even more painful. Realize you may also be mourning the dreams you had for the deceased.