He's not how he seems

There's a new girl at Hogwarts. Her acceptance letter was a year late so she will be put with the second years (the year that Harry, Ron, Hermione, ...ect are in). Who will she become friends with. How many secrets does her best friend have? You have to read to find out. The cover of this book is the heart representing my OC, the dark mark is obviously Draco even though he doesn't have it yet this early in his life, and the lighting bolt is Harry. WARNING - there may be spoilers.