Uhm, that's pretty much the centerpiece of the disorder. We don't naturally pick up on the nonverbal social cues ('
body language') around us and as a result we tend to experience a great deal of anxiety and awkwardness around other people, because we're never quite sure just what's expected of us. For the same reasons we commonly lack much animation in the way of facial expression and we suck at eye contact, so people easily assume that we're angry or surly when in truth we're just not prone to grinning.
Add to that the fact that because we're noticeably passive and non-assertive socially, we attract bullies like sh*t magnets. Like all predators, bullies go for the individuals unprotected by the herd, and we're usually alone, standing aside from the crowd.
All that has a tendency to leave a bad taste in your mouth about interacting with people, and many of us end up just keeping to ourselves rather than deal with the frustration.
So we're often perceived as being
anti-social, when in fact, we're just
non-social.
Then there are all those quirky behaviors that make many of us behave very much like Sheldon Cooper from Big Bang Theory, which is hilarious to watch on television, but not so funny when you have to live with it from day to day.

Poeticromance wrote:
I need you to talk to me before I can talk to you.
I frequently have this problem, too - it's almost a form of
hysterical mutism. When it kicks in, I literally cannot speak unless the other person speaks first. The last shop I worked in, the owners were on me about this all the time, because they wanted me to be an aggressive salesperson, and they could not be bothered to comprehend Autism in any sense.
Willard where do you learn all this stuff? You should write a book.