I kind of have the same thing, ExoMuseum. I've never had many friends and have always been perfectly happy with that. The thing that bothers me though is the way other people respond to it. In a world ruled by social media, and where you seem to be worth as much as the amount of friends you have on facebook, I've felt weird talking about how I feel about sociolizing. It just seems odd to me that people can be happy with a lot of supperficial friends who aren't there for you when you actually need them, as opposed to one or two people you can trust and who are there for you, even at your worst. But apparently, I'm the odd one out when it comes to this?
The excuses to not hang out with people, I have found, are more for them than they are for you. It's sort of like apologizing, if you know what I mean.
I always feel bad about it, but I just can't bear telling them the truth; that I am much happier on my own.
My advise would be that as long as you feel comfortable with yourself, don't let your feelings get clouded with the expectations of a society that you don't want anything to do with in the first place. If you don't want to hang out, that's fine. But if it is hurting you in any way, or you feel lonely (which is not the same as alone), maybe you should try hanging out with the people you think you could get along with, one at a time.