I struggle with this and have from the beginning. People ask me not to do it "for them" or "because when you hurt yourself, it hurts me."
Here's what I want to tell them. Maybe some of it resonates with you:
You know what? It's not about you. It has nothing to do with hurting you. You aren't even on my radar screen. I don't understand why it bothers you, and honestly, I'm not really interested in figuring it out, because the only person involved in this behavior is ME.
I want to hurt
myself. Where the heck do YOU come into it?
So yes, people are concerned, and yes, it's not exactly safe, or a terrific coping skill. But right now, it's YOUR feelings and YOUR way of coping. Hopefully you have a T helping you figure out some better ones. But in the meantime, cutting is NOT a moral failing.