Richard, I know exactly how you feel. This isn't something you'll get over anytime soon. I say this not to be cruel, but a dog is, sometimes, even more close than a person.
I was teary eyed reading your post. I went through the same thing with Buddy, my Golden. He had cancer, and I put him down at age 13, two years ago. I still cry my eyes out over my dog.
I can't even think of getting another dog. It would, to me, be like a betrayal to Buddy, however crazy that sounds.
I'm in no position to offer you any advice, because I can hardly cope with my loss, even after more than 2 years. It gets better with time, but just barely.
I'm hopeful that your pain will go away. Here's a little something that my retirement coach sent to me:
"Bless Our Pets"
They say memories are golden.
Well, maybe that is true.
I never wanted memories, I only wanted you.
A million times I needed you,
A millon times I cried.
If love alone could have saved you.
You never would have died.
In life I loved you dearly,
In death I love you still.
In my heart you hold a place
No one could ever fill.
If tears could build a stairway
And heartache make a lane,
I would walk a path to heaven
And bring you back again.
Our family chain is broken,
And nothing seems the same.
But as God calls us
One by one,
The chain will link again.
Bless Our Pets.
Author Unknown