Please Don't Make Me Cry (Larry & Ziall)
I'm not any good with descriptions so here we go. I'm also not a doctor so I don't know if any of this is accurate or not so bare with me here:
Louis is 19 and has Peter Pan syndrome. The thing about Louis is that he also has aspergers. After his parents divorce and his mother's death, he hasn't had anyone to be there for him. He has Zayn, who has been his friend since the beginning, and Niall, who was one of Zayn's friends. No one else even bothers trying to break through all the walls Louis has managed to build up, Zayn being one of them, until one cheeky lad comes along trying to change that. Will Louis let him in? Or will he just push him until he gives up?