I dunno. I have often wondered if my son had asperger's, because he demonstrates a lot of the traits. But on the other hand, it depends on the situation. He socialises really well with people who are "interesting", and not so well with people who he doesn't think have anything in common with him. I don't think this is a big issue really.
Some people are far better at small talk and making friends than others. I take after my Mum and will talk to anyone about anything... for ages and ages sometimes...
I haven't always been this way and tended to be quite shy and lacking in self-confidence when I was younger, always worrying about what people would think of me if I said or did the "wrong" thing, but that is something I grew out of towards the end of my 20s.
My Dad, on the other hand, is far more reticent about talking to people he doesn't know (unless it is a cute woman), but is still the life and soul of the party when among people he knows well.
I have a lot of "friendships" that are actually quite shallow, when I could count my real friends on the fingers of one hand.