Oh I'm so sorry to hear that as well :( those old cats who love you with all their heart are just so amazing. He would happily sit on my lap all day and whenever I sleep he would come up and rub his face against me and then sleep on my chest.
Like I keep thinking I want another cat... but I don't want another cat. I want MY cat back who I had for 16 years!
But now I gotta take care of my little 3 year old boy and figure out how to keep him happy!