So agree Donna, and I feel your pain, truly.
Many times I've questioned my emotions when losing a dog, because I've wailed and felt physically hurt, something that has never happened when I've lost friends or family.
I was 66 when I bought my puppy Border Terrier, and wondered whether I had done the right thing. Whether I would be incapacitated at a later date and not be able to walk her etc etc, and I would be 80 if she 'hopefully' lasted the normal average of 14 years, and if I was still around too. Well, she had her 6th birthday last Friday, and I'm 72 later on. I have prepared myself mentally that when her time is up, mine will be too. Apart from 2 brothers with families of their own, I have no family and live alone. So M is my heartbeat, my darling girl companion, who knows my every move, senses what I'm thinking but can be wilfully truculent when it suits.
She is my last dog, and I'm her first love, - no children, no grandchildren, I am no-ones first consideration, and only get a cursory visit for an hour on Christmas Day by a couple of nephews. There are thousands like me in the same boat, which is why I cherish every day that me and my little dog are together.