Autism is a disorder characterized by extreme aloneness, communication problems, preservation of sameness, and ritualistic behavior.

Autism, or autism spectrum disorder (ASD), is characterized by challenges with social skills, repetitive behaviors, speech and nonverbal communication, and by unique strengths and differences. The symptoms you described, including extreme aloneness (difficulty in engaging with others), communication problems, preservation of sameness (resistance to change), and ritualistic behavior, are common characteristics associated with autism.