Hey, you know what I did when I found out that my journal was read? I started writing in the form of poems. I used symbolic phrases and expressions that only I could understand. By the time I started to do this I stopped hiding it overall. I was like "hahaha! for you it's just a poem but for me...it's a memory!".
Through the years the poems got better and better and you know what....some are really really good. I will try to publish them at some point! Ha! How about that!

Maybe this idea might help you....(?????).