My condolences. I am the last of three oldsters who used to be called 'The Three Musketeers', by our peers, and 'The Last of the Summer Wine', by the younger set.
I miss both of my mates, and it still feels kind of lonely, but the upside is, it stopped me drinking. No fun doing that alone.
Now I just remember the good times. It helps; lot.
Hope you can do the same.
Cheers
Wobbly