Stop cutting

Started cutting 2 years ago, stopped after a while but recently have started again. I don’t do it everyday, just a few days a week when I get extremely depressed or I feel like I’ve screwed up. I am extremely shy and have antisocial leanings, but I’ve tried to improve but it just isn’t working. When I get embarrassed when I feel I shouldn’t or don’t do things that I feel I should, I cut to punish myself for being so weak and pathetic. I know It’s wrong but it’s the only thing that makes me feel better. I’ve tried other things to help me cope, but they just don’t work, I don’t know what to do.