I am. I have a lot of trouble with social interaction myself. It's gotten better though, with therapy. I'm getting a little better with talking but not very much.
I'd rather not go into detail about my disabilities since a certain someone will come in and twist my words and blow what I say TOTALLY out of proportion. Still, I agree with everyone else, don't diagnose yourself just because you have a few flaws. You may not make eye contact but that doesn't mean you have something wrong with you. Also, having online friends just means you have no life... it has nothing to do with having a social disorder. I have best friends online but I also have friends offline that I try to communicate with as well.
Also, I have to ask, are you talking about the movie called rain man? Because that movie is about a person who has severe autism, not a social disorder.