I like socializing, but usually only on my own terms. I'm uncomfortable in large groups, and with people I don't particularly know well. Once I get to know someone, it can get pretty easy, and I enjoy it. I was commenting to my wife last night, when we went out to dinner with a friend, that now I know that friend better, it's no longer painful to keep eye contact with her. Still not easy, but it's not uncomfortable in the same way it would be with a stranger (and, with my wife, it can even be pleasant on occasion to keep eye contact with her, the only person I think that's ever been the case with).
I think that because those with AS find socialization difficult, many just get turned off by it, and would rather not deal with the stress. That's understandable, and certainly how I was for a lot of my teen years, but often what is widespread discomfort is misinterpreted as a lack of desire to socialize, probably even by those who feel it. I have to say, I also do enjoy spending long periods alone though.
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"You're never more alone than when you're alone in a crowd"
-Captain Sheridan, Babylon 5
Music of the Moment: Radiohead - In Rainbows