I used to cut all the time. It became an addiction and i do think it saved my life from myself a few times. But, if you really have reached the point that you want to stop then you need to take action in yourself. Realize the difference between wanting to stop because you know its unhealthy and wanting to stop because you really don't like doing it at all anymore.
If thats the case, here is what helped me:
-Journaling. I started a diary on opendiary.com where people who didn't know me could talk to me and help me. people that actually knew what i was talking about. It didn't help me stop but when i wanted to, sometimes, not all, i could get on and write all my feelings down and then i wouldn't need to cut anymore
-When you want to cut do something to bring yourself up. I would put on glamourous make-up and my favorite clothes and take pictures then edit them so that i looked really hot. It really helped me feel good about my self.
-Talk to a counsler that you actually like. I've been to a few counslers and always thought it just never helped then i met Kevin, my current phycologist. He is much like me and we think alike. I think having an opposite sex counsler can help more because you can get into the opposite mind if your problems revolve around them.
-Take anti-depressants. I have been on them sense i was 13 but a one month perscription lasted a year. I'd start taking them, forget, feel i don't need them and fall back into depression for months till it got so bad i'd try again. For the first time in my life, i have been taking them every single day in the morning. I have a beta fish i feed and i take my pills when i feed him.
-Work with kids. I teach little girls how to swim at the rec-center for extra hours and i didn't know how much i'd love it. Making swimming their favorite thing during the week is amazing and i love the feeling i get when i'm done. It sustains me all week. Volunteering at daycare or at hospitals or anywhere is good too.
I have attempted suicide and ended up in the ER over a boy and sense then my life has turned around. I never thought i would be as happy as i am right now. I really thought it impossible.
Keep your chin up and stay at it! one day i looked around and just realized, wow i haven't cut in sooo long. then you realize your cured.
The one thing i'll tell you though, you can't stop for a friend. Litteraly it is pretty much impossible to stop unless you really really want to for you.