give me advice

Hmm, it’s hard to help someone that’s cutting. I’m also a cutter. The only thing I know is that you must not prohibit it. Also don’t take his “weapon” away, the thing he made the cuts with. Also don’t let him choose between your relationship and cutting. And don’t get mad on him. All these things will probably work reversed. What maybe will help is: support him, not to cut, but in other things and help him. Don’t get mad if he had cut, cutting is an addiction. Do nice things with him, so he has less time when he is alone and could start thinking which mostly end in cutting. And talk with him about his problems and about the cutting, most people want to talk about it with someone they trust and wouldn’t tell it to anybody and wouldn’t prohibit the cutting. But not anyone wants to talk, so no is no, accept that. I hope this will help you a little bit. And remember: wounds will heal…