Hey,
I'm sorry you are so depressed. I know what it is like.
Just don't cut, really. I have done it, And i regret every scar i have.
Some people say yea it's part of you and makes you strong. But if you cut you can't walk in t-shirts or go swimming and if you even bruise/break your arm or anything they will know you did it. I had to reject medical help when my arm was bruised because she wanted to see my other arm to compare.
Just trying to give you an impression of what it is like to live with that stuff.
It's definatly not worth it. Things to distract you could be playing games, reading books(if you like it) Or doing some sort of hobby. Or just being with friends.
Sorry if my advice sucks, just doing my best
Good luck!