I have a nearly 4 year old neutered female cat. I have been thinking about adopting another cat, but I fear they won't get along. Current cat is not really social, rarely likes being touched, instead requires attention: playtime, being near (but far enough), etc.
What are your experiences with second cats? Are there age / gender combinations which are the safest?
Edit: thanks for all the replies! Forgot to mention that she is an indoor cat.
Despite many commenters saying cats are not social, in reality cats were proven to socialize a lot. It is also true that they're territorial and that can matter more if they're not neutred (I recomend spaying all your cats for many reasons).
Your cat can benefit a lot from the presence of a fellow feline. If you decide to get a second one, you should be prepared for a transitional period of helping the cats to get used to each other. As someone else described already, it's good to separate them first and let them get to know each other in phases. It's good to have enough hiding places for them and safe corridors.
You will also need to give both cats more attention in the beginning and even after they start to befriend each other and play, it's good to check whether they don't attack each other too one-sidedly or just generaly too much - in that case you need to play with them more yourself.
In my experience it's really worth it, 2 cats > 1 cat.
Oh, I forgot to add: your kitty is a beauty!