I'm really really struggling to report what happened

I know this sounds dumb but I don't know if I want to report what happened. The person who did it is someone really close to me and I just want them to take a magic pill that makes them normal. I want them to just be a good person. I'm not ready for them to leave my life. I have to report them to someone though right? For a while I thought I could just move on but I can't and I know its impossible to know if he will or won't hurt someone again. I wish things were different.