Yes, there are times when I struggle with motivation as well. I think that that is normal. The most important thing is to start; to take a step in the direction of where you want to go. If you don't know what you'd like to do, that's normal, too.
Can you take an inventory of your strengths and interests? There are probably jobs along the lines of what you are interested in that do not deal with a lot of people.
I don't know if you are still in school, but I remember taking tests that help to gauge your interests by asking questions about various aspects of jobs (ie: Would you prefer to work indoors or outside?, etc.) and then showing you areas that you would do well in. I found one here...
Career Test High School College Students Free Job Quiz Best Tests
Regarding gaining confidence, I'll tell you something that I was once told and something that I tell my children and that is that most people want to see you succeed, especially your employer and family. When you go on an interview and get the job offer, that employer is saying to you that they like what they see and that they are confident in your abilities.
While things won't always pan out, you'll be surprised if you just show up. I've taken job offers while being scared to death that I won't measure up and will somehow be found out to be a fraud. I can tell you that in 9 out of 10 jobs, after I got to know the position and had gotten over the learning curve, I look back and think, "Wow. I was worried for nothing."
I've also bee on job interviews praying that they would end and even apologizing to the the team afterwards because I was so under qualified at the time.
Some will go well and some will... well, not, but you sound like a really smart guy. You have strengths! You can do this! Your aspie traits are a great benefit to any business. They need someone like you!
Best of luck!