I think something that has helped me enormously with adjusting to living with other adults is to curb my imagination.
People by definition don't mean what I think they mean when they say stuff. It is my imagination that fills in the blanks, comes up with ironic tones of voice they are not using, hearing accusations where there are none to be found, or interpreting the following sentence 'Eww, who left the hair in the sink?' to mean 'Blackunicorn, you are such a disgusting person who keeps leaving her hair all over the place. How can you do this to me? I think because of this hair I found I can never love you again'.
Me: bi female in my twenties