Great idea! To make you feel better, I 'lost' my newly adopted Siamese kitten years ago when I lived in a pre-furnished corporate apartment, about the size you are in. Not a lot of places to hide but SHE DID - right behind the warm cable box, up against the back of the entertainment center. Just a tiny sliver of space but she owned it proper. lolOh!! Sorry to double reply but I just thought of something!! We have a security camera in the living room, and I can set it up to manual record! Maybe when I'm sleeping I'll find a glimpse of him!!
You can also use the camera when you and your BF leave for a few hours to do anything (but be at home). Having no one in the apartment can make kitty feel safer.