PLEASE Help!

I never thought I would be someone who would post on a forum asking for help but here goes... I've been picking at my arms/face/back since I was 12. I am now 20 years old. I cannot stop, my skin looks like a battlefield of red scars and I am ashamed of it. I pick when I'm bored, happy, sad, excited, nervous anything. I tried putting lotions, using scrubbers, getting sunburned so bad that it would eventually peel so I could hide the scars. Nothing seems to work. I am to the point in my life that I am tired of hiding my arms, using excuses as to why I can't go swimming or hot tubing with my friends. I will wear long sleeves in the middle of summer on the hottest days. I just want to stop but I can't. I don't know how and if I ever will but I thought maybe I could get some advice or help by reaching out to others. I came across this site and was amazed to see how many people have the same addiction as me. I would honestly would rather be addicted to cigarettes than be a constant picker. It has made me depressed and the more it makes me depressed the more I pick and cry. I've even tried wrapping my arms and cutting my finger nails down to the skin so I can't pick. I don't know what to do anymore...I pick until I bleed and I'll pick the same spots over and over because I get joy of popping the little zits. I wish I could get professional help but it seems difficult to tell someone that your addicted to picking at your skin. Only close people know I do this and they think I can stop at anytime because it's all in my head...which it probably is to some extent but they don't understand and probably never will. Is there someone out there that can help me stop or any advice. I'm willing to put any lotions or home remedies on my arms just so I stop. It's ruining my life!