With pddnos you're in a pickle.
Not bad enough to be with those with "real" problems...not that yours is not.
But not good enough to be with "normal" folk.
What to do?
I'd just try to join a good church that has programs available for singles. Don't TRY TO MAKE FRIENDS...just be nice and friendly to everyone and smile a lot...friends will come naturally. You can't force friendship because others don't understand your problem.
I do because I have a 19 year old niece with the same diagnosis...she's on the autistic spectrum, which you probably are too.
We have to accept what God gave us.
Just be nice to everyone, like I said.
I hope your parents are supportive.
If you could, you might want to consider getting a job,,,any job. I know a young 21 year old male that works in a local supermarket, packing and unpacking. Anything just to be with people.
You'll be in my prayers.