A memoir is a book of memories that is a work of literary non-fiction. It differs from a diary because in a memoir the writer is the main character, and it is a reflection over the years with the collective experiences having a general theme. In a diary, it goes day by day and only reflects that days themes. Maybe you should write one. But wait a few years. You have a whole life to live with many more stories and experiences.
Whats a memoir: www.shmoop.com/my-antonia/ending.html