Eddie,
I know you and I have locked horns more than once over the years on this forum, but I wanted to say that I definitely identify with what you're going through. I've lost a few dogs due to age, illness, etc. but my absolute favorite dog, Shake, a beagle/lab mix, was the absolute hardest of all for me to lose. She was my childhood dog, she was a stray that adopted me and we have been steadfast companions ever since. Her health took a turn for the worse & had to be put to sleep my senior year of High School. Even though that was decades ago, that dog seemed to have forever spoiled me for all other dogs.
Moving ahead to now: We just recently had to put Squeak, our Siberian Husky to sleep due to health complications and it was hard, especially for my wife since it was only just literally a year ago that we had to put another one of our family favorites to sleep. But as others have said, finding another furry companion is the best therapy. Now we have two new additions (not replacements) to the household, a Dinmont Terrier and a Border Collie/Terrier mix, both we got from the local shelter, and eveyone's lives feel complete again.
Yours can feel it again too, just do some searching and you'll no doubt find a new companion that will steal your heart and you can create new memories.