I live alone right now, but had women live with me short term from time to time. Only told one of them about my use because I thought she'd be cool with it (she's working out as well and is no stranger to Anavar herself), but she kept nagging about it, blamed everything bad on them ("oh your're so irritable, must be the steroids" Yeah, don't even think it's because you're a thick girl), and tried to blackmail me (more or less) twice. In other words, never trust other people, especially someone your emotionally involved with, since these things can get really nasty.
Anyway... Just go to Praktiker and buy a small lockbox, then keep the stuff for immediate use (needles for drawing and pinning, couple of syringes, swaps, vials you're currently using) in there and put it somewhere where it's easily accessible while not being in plain sight. Keep the rest of the big supply in a suitcase of something in the back of a closet or something. I don't know your living situation, but you should find a place to stash it.