My heart goes out to you.
V & I are going through a similar situation with our 13 year old puppy, Sake.
She has been diagnosed with congestive heart failure, & it is just a matter of time now.
Breaks my heart. We lost her twin sister, Yoko, three years ago. (We think someone poisoned her.)
Still haven't gotten over losing her.
I won't be getting another pet. I would expect it to live up to the ones I lost, & that would be impossible.
I have always had a greater affection for animals than for people.