What is wrong with my cousin?

My cousin has been feeling a bit upset lately because his parents never told him much about himself. He wants to know why he cant handwrite or why he has to have things explained to him so much. He also wants to know why he finds it hard to sit still and concentrate. He had his own chair in class. He also wishes people would tell him why he had to write his tests in a different room. He thinks that his sister is hiding stuff from him. He confides in me a lot