Help identify a movie please

Does anyone know this movie:
Girl has male friend over after drinks and he assaults her and she wakes up in a room. No memory. The guy there tells her he’s going to take care of her until she falls in love w him. I thinks she plays along?? She finds a book in the wall with don’t trust all over it. The guy ends up telling her that he’s her boyfriend and after she was assaulted didn’t remember him and is using this as a way to help her remember. Apparently he’s told her this many times, she tries to escape but then he finds her and brings her back and the whole thing starts over. It’s killing me that I don’t remember what it’s called.