I have an 18 y.o. stepson who has nonverbal learning disorder, which is somewhere on the autism scale. He doesn’t read body language or gestures very well, or understand, for instance, when someone is annoyed with him.
He was undiagnosed for a long time, and has grown up very angry, very uncommunicative, and very embittered towards his parents. He is in a bad place, and won’t ask for or accept any help from anyone who can help him.