I'm sorry for your loss
They do take a piece of our hearts when they are gone, we must cherish every moment we spend with them.
Our boy Max is about 15 now, still good for his age and for 3 legged cat he gets about a lot. I know his day will come one day so I make sure I cherish every moment with him. He loves to cuddle up to me while I'm working and follows me everywhere I go around the house.
Never forget the day we rescued him, we went to RSPCA looking for a kitten and ended up coming home with him. When we walked past his enclosure he was meowing and stretching at the glass wanting to come out. I looked at him and carried on walking looking at other cats. When we came to the end of the enclosures Mrs looked at me and said you want the disabled black cat.....I laughed and said yes.
Been the best boy I could ever ask for, so happy I made that choice.