This is my opinion:
Fran, you can sink into a form of depression if you linger on what you lost. I feel it is a much better to sit with your many memories of what you were so fortunate to have. Live with joy and contentment when you think about your friend, you are one lucky man to have a friend for so long.
Your glass can be half filled or half empty!
I have lost five precious friends, that is what happens if you live long enough. I only remember the great times we had, even though I sat at bed-side when three of them past.
Life my be short, but it’s really good, John C. (I’m getting my 15th keyboard this week aaaaaah)