I need big help I cut and I don't know how to stop!?

Ok so Im 16 and im a cutter Im addicted to it and i need to know how i can stop this! i am emo i like heavy metal rock but my parents got ,e on a leash and the only way for me to get away is for me to get away is for me to cut my arm off.....please i need serious help Im afraid if i go any farther ill be getting my self into **** like drugs I've already thought about doing heroin! and its weird cause my idol is Nikki Sixx! I have bug dreams my friend and I we plan on moving to La together so I can get somewhere with a music career and she can be an open heart surgeon I don't wanna ruin my future because of what I am now! please help me! I don't know any other way to make the numbness running through my veins cease It wont stop unless i harm myself! :,( and my parents might send me away to a mental hospital and for some reason (now im a Horror movie fan) Im afraid of mental hospitals! :,( and counseling! my parents think I already wanna kill myself cause Im a Fan of MArilyn Manson!!