I understand how hard it is to stop when it's been familiar for a long time. I used to cut for about 10 years. The last time was about 8 years ago. Sometimes when I get very angry or frustrated I can still feel my veins itching and the urge to do it again. But I don't.
You're cutting again because there's something that's overwhelming or difficult to deal with or talk about. I used to keep a lot of secrets and hid a lot of things too, but that won't help you deal with the root of what's making you want to cut to begin with. I was lucky enough to have some pretty amazing friends and a really great when I was trying to quit. When I had the urge to cut, I'd give one of them all of the sharp things I had, so that I wouldn't have them around me. Sometimes if I felt that way for a long time, I would stay over at their place for a day or two, so I wouldn't be alone with myself. Finding friends who are sympathetic and support you makes all the difference. If you can talk to them or one of your counselors about what your feeling when you want to cut instead of cutting, maybe they can help you work your way though it. I do that, and I also run. Every day, if I ever get the urge, I run until I'm too tired to be that upset about anything. It totally works for me, but you'll find your own thing. Good luck, know that there are people who understand and care about you.