I’m trying to find a book, it’s about a boy who’s parents are separated. He writes a letter pretending to be his mother, and sends it to his father. The letter is asking for forgiveness and for the father to come back to live with them. The boys attempt to get his parents back together fails. In the last part of the book, the boy is in the movie theater with the girl he likes and she asks him, “is everything ok?” And he replies, “yes, everything is going to be ok”. (This is everything I remember.) Also the name of the book might be something like “shy guy” or “guy shy” or just something with guy in it. I hardly remember anything about it.