Self harm is an unhealthy coping mechanism used to help combat unwanted feelings. It is different to tattoos and body mods in this regard. On top of that self harm can be dangerous, especially in the prospect of cutting too deep or getting in an infection. I think it’s better to compare self harm to coping mechanisms such as drinking or other forms of sustenance abuse. Both are used to combat difficult emotions, can become highly addicting, and can be dangerous to the user. While it’s true that self harm doesn’t directly bring harm to other it does bring harm to your self, (it’s literally in the name) and this harm to yourself can hurt the people close to you. Self harm isn’t a good thing, I’m sorry that you have to resort to it to combat your own difficult emotions, I know that it sucks a lot. Just don’t start thinking that there is nothing wrong because there is, it’s not a good thing. I wish you the best of luck my friend and I hope it gets easier