Too good to stop (trigger warning)

Last night my little brother and I were playing with his new dart set. We were taking turns throwing the darts, etc. When he left the room to get a drink, I noticed how sharp the darts were. I relapsed and it felt so good. Every time this happens I find myself saying stuff like "It's not that bad, I can stop whenever I want to" and "Is it really that harmful?" I always end up justifying my actions. I'm getting so tired of it. Has anyone actually successfully stopped self-injury?

I was able to stop for almost a year, but I accidentally relapsed once I was giving my dad's knife on occasion to use. Once I had it for a day to myself, I noticed I immediately went back cutting again. Cutting for me is a bit dissociate, since I don't notice I'm doing it, but still, I'm not very happy with the end result. I do have similar thoughts sometimes, after seeing the damage like, "it's not so bad" or "I don't think it's harming me or anyone".

Overall, I'm not sure how someone can successfully stop, I know for one, I would need to stay away from sharp objects and sometimes stay away from this forum at times, since it's triggering just by thinking of the word 'self harm'. I think what I did last time when I stopped after a long time was that I just never had any motivation and actual sharp objects around me. I could of been using my coping of music for my anxiety too, that helped me forget.