I live in a house with a few people, I don't know where to put it.
Put it in a rolled pair of socks ? or underwear ? Behind boring books ?
When I was 18 I used to hide them in the ceiling. Now I just keep them in a bag in my sock drawer.
I keep them in a big folder with old documents, school work and essays. No one is interested in looking there!
Safety deposit box.
lol but no seriously just put them in your closet in the very back, or deep under your bed. Anywhere that has a lot of clutter and nobody will have any reason to look.