Earlier this year, I had to have a pet euthanised, and even though it's been many months now, I still miss him very badly. I have two others, one of whom hasn't been very well on and off all year and one who is generally in good health.
The sickly pet is currently doing ok, but I do worry about him. He always seems to need attention of some kind!
However - the more robust one has been showing some very minor signs of an age-related condition recently. Nothing fatal, and no signs that she's in pain. But I'm so scared to take her to the vet in case they tell me that she ought to be put to sleep. If I lost another pet within months of my previous loss, I really don't know how I'd cope, and I am already scared that the weaker one might not pull through.
Am I being selfish and irresponsible? To be clear, I would obviously take her to the vet if I thought she was in pain or struggling. This is probably more of a "quality of life" thing.