Dan,
I am so, so sorry to hear about your Dad...
It is Never easy when a loved one passes..as you know several of us have gone thru this recently so we do know what you are going thru.
Just try and remember the good times and that he now is in a much better place and not suffering anymore.
When my Mom died I learned that it was really MY selfishness that wanted her to be here rather than for her to go so she wouldnt have to suffer anymore.
My Mom was in my arms when she died, it is probly the worst thing I have ever had to go thru but I would go thru it again knowing that she didnt die alone.
I will keep you and your family in my thoughts and prayers during this most difficult time.
We are here for you if you need us,
Lisa