Despite their independent ways, your cats are very sociable animals. Of course, they will never let you know that, which is why they quickly hang up the phone when they hear you coming. But the truth of the matter is they can get lonely and bored if you don't spend enough time trying to get them to play with you.
To minimize the chance of your cat feeling isolated, you may want to consider getting another cat. And to minimize the chance of that cat getting lonely, you may want to get yet another cat...and so forth. Here are some tips you might find useful for multiple cat households.
Acquiring New Cats
In general, the following combination of cats seems to work best: two kittens, a mature, neutered cat and kitten, or two mature neutered cats (either two females or a male and a female). The most volatile combination seems to be two uncastrated, mature male cats.
Consider your current cat's personality before introducing a new cat. An active cat is more likely to accept a new kitten. A quieter, more reclusive cat might prefer a mature, adult cat as a companion.
If your cats exhibit personality conflicts, you can reduce the tension between family felines by making sure each cat has enough personal space and personal possessions to fulfill its needs.
Making Cats Feel at Home
Make sure you have at least one litter box on every floor and that they are easy to get to in an emergency. To avoid territory conflicts between cats, consider placing litter boxes in various locations throughout the house to avoid the exclusion of one cat from another cat's territory.
Be sure to keep plenty of clean, fresh water available for your cats at all times. Keeping bowls in multiple locations throughout the house might be a good idea.
Keep scratching posts and beds in several locations to accommodate all the cats in your household