I am really starting to understand why I do this...i think

I have been picking at my stomach for almost a year and a half now, I used to get ingrown hairs on my stomach and thought that I could pick out the hairs and stop them for forming...but instead, I just created these nasty, brown, and unsightly scars that are stopping me from persuing things in my life. Relationships, opportunites,and activites are all flushed down the drain because I am constantly trying to hide my scars...there are so many things that I can't do and because I am pursuing a field in the performing arts, I have to be comfortable with my body and with myself. I think that my problems are based on low self-esteem, which many of my friends (who don't know that I do this, but know that I have self-confidence issues) and family are really confused as to why I have such low self-confidence. I have tried to stop and because I haven't been doing this for as long as some other members on the site, I know and am determined to stop this issue. I am now a sophmore in highschool and really need to stop because this is causing me to feel terrible about myself. I was wondering if anybody knew of treatments for scars, that are effective, and ways to channel stress, feelings of low self-worth and ways to make my family understand what, and why I am doing this. I want to be strong enough to stop this, and becuase I feel that I have other problems with my body like stretch marks, and things of that nature and to releive such a simple, yet troubling issue will do so much for me and for what I want in my life. I have to stop going home and crying myself to sleep because I feel so ugly...