Today is actually my first year anniversary of cutting. I spent the first two months in it alone before I told a friend id literally known 2 months. I guess I trusted him and figured it would hurt him less and he was less likely to tell people because he didnt know the rest of my friends very well. He hasn't broken my trust yet and we're great friends now. It just hurts him when I cut.
The second person I told was another friend but also my crush. He insisted that I could trust him and that he wouldn't care. And I believed him. He wanted me to ask him if i wanted to cut and explain it to him first, which I did. However, whenever he said no I did it anyway so it really made no difference. Recently I've found out that he'd told 2 of my friends that I cut and 'come to him apologising' months ago. Let me just say that I no longer trust him. He'd also encouraged me to tell my best friends I cut, which I did, but now regret because it hurts them so I've lied to them an told them I've stopped.
The most recent person I've told is another friend of mine who's sister used to cut. He hates me doing it but wants to gelp and im probably happiest that I told him.
Overall that's 7 of my friends which is quite a lot. However it makes it easier for me to talk and ask for advice.