OMG16,
I saw in another post that you said that your son is not sure what he is going to do with his life. I just want to point out that neither does my 19 year old nephew, who finished high school last year. He has since moved to California where his older sister is going to college, and found a job wiping tables at a coffee shop. As far as I can tell, he spends the rest of his time riding a bike, shooting hoops, playing an electric piano, and playing John Madden Football or Tiger Woods Golf on Play Station. I suspect he does some instant messaging as well.
In fact most of us take quite a while to settle into an adult life. I don't think I really figured out what I was I going to do until about the age of 35. These days, being 19 and unsure about your future is par for the course, and nothing to worry about.
I wonder if there is a class at a YMCA, or a community college, or a park district, where he could get out and about a little. It doesn't need to be academic or job training, just something to do where he could interact with new people a little. I'm sure that is not easy for him, but in the right environment, it might go pretty well, and it would liven things up a little. Some kind of art class, for instance, or yoga, or something like that.
Steve