Oh Teresa I am so sorry to have read this just now, To echo what many others have said you have been truly blessed to have had his company for so long and he has been extremely fortunate to have had you and your family/friends to care for and love him so much.
I have always adored that photo of him on the staircase, his eyes are really a picture into his soul I think
We shall pray he slips peacefully into the next world when he feels ready and meantime you enjoy many happy shared moments
Christines post was wonderful even if it has me in floods of tears