Its good to let people you trust know about this kind of stuff and persue to get help. But I understand it could be hard to tell someone your getting to know about it cause some people just don't understand. If I were in this situation, I'd go with my gut. If it feels right to tell them, then do. But if you really want to hide the scars, I'd recamend getting a tatoo over the marks. That is if your not opposed to tattoos.