Dear Diary, (One Direction fanfic)

Stacy is Louis little sister but only by a couple years. Before he was Louis Tomplinson 1/5 of One Direction he was Lou Stacy's best and only friend. Now Stacy is being forced to spend the summer with him and the band and write in her diary to get all her feeling out. What will happen when she learns the real reason he left her all alone?

Edited by @LittleDoYouKnow