I live in a house, he doesn`t lives with me but was working his way into moving in by slowly bringing his things to my room.
I went easy on him for several reasons:
1) He is one of my two best friends for several years.
2) I`m in a good place economically, more or less mid-high class, while he`s easily low-low class.
3) I`m not particularly attached to money and I`m really careless with my things, especially in my room, it`s not odd for someone to go into my room and see money laying around.
4) I never had trouble with missing things before.
That said, I see now how staying silent was a mistake, when he was relatively sane I didn`t mentioned it to him because I knew it would be quite embarrassing for him, after that I didn`t mentioned anything because it could worsen his condition. I decided that from now on I`ll simply receive people in my living room, no one else will get into my room besides my family.