I'd be curious to know how old you are?
I'm in my sixties and have experienced the loss of many pets. Recently a male relative in his thirties experienced losing a cat. We were very surprised at how affected he was. It turns out that he never had pets as a kid and had never experienced such a loss before.
It's just a fact of life that humans outlive most pets by multiples of their lifetimes.
One of our cats has spent more time in the hospital than my wife and I put together. The cat suffered an unidentified illness, a gaping wound that wouldn't heal, and finally a poisoning by anti-freeze that appeared initially to leave the cat permanently disabled. She's alive in great part because she has the nicest personality of any cat we have ever owned.
After the anti-freeze poisoning she came within a day of being put down because she was obviously too dizzy to walk and wasn't taking in fluids or food. I'm glad I gave her just one more day to improve. She now seems completely recovered.