If you want the person to know that you set them up to find the diary, find some way of making this clear in the diary. You might write something that they’ll find in the text of the diary, perhaps in a passage about themselves, such as “And Jake thought that when he found this diary he was such a smarty pants but little did he know that I had decided early on he needed to read these home truths about himself and I orchestrated his desire to find you dear diary. " Or, you could make a more upfront statement at the beginning of the diary, like “Jake, you moron, I WANTED you to find this diary. Have fun reading about yourself and what I really think of you. " Or, perhaps you want to keep this all totally subtle and only find out through things the person says or does that they have read your diary. For example, perhaps you want someone to love you or you want someone to give you gifts you really like. By orchestrating their finding of the diary and expressing your feelings or your wish list, this could result in them declaring undying love to you. . . or finally buying you that gadget that you actually wanted for your birthday.
Laugh or smile while you’re writing, or write furiously (quickly) with a determined look on your face.
If the person asks you if you’re writing about them in the diary, be evasive. Say something like “Maybe… maybe not. Maybe you’re not worth writing in my diary…”.
Be very urgent and defensive about wanting no one reading it!
Behind your dresser drawer. In an old backpack everyone knows you don’t use. Under some old blankets or clothes on the top shelf of the closet. Taped under large furniture with strong tape. In a zip-lock bag in the toilet tank. Behind a bookshelf. Under your bedspread. If someone walks into the room where you’re writing, keep a blanket nearby to quickly but obviously hide it under there.
