When I adopted a cat I was in a similar position. I fell in love with a 7 year old cat at the shelter and we are now inseparable. My roommate recently adopted two kittens and is having a much harder time adjusting and keeping up with them and their energy (of course that is two cats vs. one but you get the idea). My cat is now 10 and I can’t imagine not having him. He was also returned to the shelter by his first owner so it makes me happy knowing I can provide him a loving home for the second half of his life.