I echo all of the thoughts above, and will add just one other. Although one year has not been enough time to heal the emptiness, it will come. My wife lost her father suddenly at an early age. He was a great guy and everyone loved him and missed him. He and my wife were very close. The first year or two after his death were difficult for all of us; but especially for her. It has now been almost 30 years; we all still miss him and mourn the fact that he never met our son, or that we never had the chance to share our more recent prosperity with him. However, the pain of the loss has diminished; replaced more with sorrow for not being able to share the things we know he would have loved. So it really is true that time does heal. It takes different amounts of time for all of us and when you are ready, you will begin to remember the great things he gaave you, with a team AND a smile.
We share your loss and admire your courage for putting your emotions out there for us all to see.