He cannot convince you to give the razor blade up. You have to come to that yourself, otherwise you would just be replacing it. I would never give my x-acto knife up. Even the whole year I went without cutting. And I wouldn't worry about being "locked up" again. He has reassured you that he won't tell anyone. And you are right, even if he did, they can't hospitalize you unless you feel like you are in danger of suicide or homicide. I have been hospitalized 7 times, so I understand, too. To quit cutting, if that is what you want to do, it doesn't just mean getting rid of sharp objects. If you truly wanted to hurt yourself, you would find a way to do it. He really has no right telling you what you should keep or throw away.