There is really not much that can heal your heart other than time and personal strength. As far as your other kitty, though, I was not aware that a kitty could develop bad habits from being loved too much. Actually, I was not aware that you could love a kitty too much! I think you should do whatever feels right as far as supporting your other kitty - she probably needs a lot of attention now too. Enjoy her totally for her remaining years. You don't necessarily need to get a second kitty to fill the space in your heart, unless you feel it would be beneficial for your other kitty to have some feline company after all these years. I think you'll know when/if the time is right. And there's nothing corny about your parting words to your kitty; I think it's wonderful. I've done the same thing with lesser creatures (my daughter's rats).