I am scared I am going to cut, help?

I don't want to but the evil bitches at my school are putting me into depression. The leader of the group I am with always try's to get rid of me and my only friends at school are turning into bitches and my and a good friend at school broke away for about a week and she was sucked back in again. My 2 best friends our out of school so I feel so...alone. I don't think I will but my dreams of becoming a singer or an actress feel like they are slipping and I was listening to some random song by some guy when I had uTube songs on shuffle and it was called something like "somebody" or "born to be somebody" or something like that, and there was a campass next to me (u know what you draw circles with) and I almost cut on my wrist, the only thing that stopped me was that I know my parents would worry sick and so would my FRIENDS THAT HAVE STAYED TRUFUL. At the same time if I did cut and showed those bitches what there doing to me they might wake up and get a slap of reality... any help? advice that doesn't involve rehab? ANYTHING TO STOP ME CAUSE I KNOW THIS IS NOT THE WAY 2 GO!!!!