How do you know if your boyfriend is on the spectrum?

Symptoms of Autism Spectrum Disorder in AdultsDifficulty interpreting what others are thinking or feeling.Trouble interpreting facial expressions, body language, or social cues.Difficulty regulating emotion.Trouble keeping up a conversation.Inflection that does not reflect feelings.More items

Can you develop autism as you get older?

Older children, teens, and adults do not develop autism. In fact, to qualify for an autism spectrum diagnosis, you must have symptoms that appear during early childhood (i.e., before age 3).