I've Got It Wrong (Larry Stylinson AU)

What happens when you can't tell a dream from reality? How do you know which is which? Do you try to tell someone? After a traumatic event in Louis' life he can't differentiate his dreams from his reality. He gets used to living with his flaw. Over the years he learned to build up walls to keep everyone out. He blocks everyone out so they won't see how crazy he is. What happens when one person tries to tear down Louis' walls? What happens when Louis sees this person as a threat and someone that can help him. The only problem is he doesn't know which person to believe in.