Dont cut yourself... It doesnt really help you: you cut yourself, you bleed and you feel sad again. Instead try to get a hobby/job. That way you get your mind off cutting.
Finda friend who will listen to your problems. Make sure you find someone that actually will listen and help you. Dont get a friend that just says
"I understand" cause they dont know what to say, they'll be just a drag.
Don't shoot yourself, you might die and go to a worse place or you might survive and feel even more pain. Also, try hanging out with your friends. Friends (good friends) can help you get through hardships.