I want to quit masturbating (guy) I need help to stop. PLEASE?

You might think you could stop masturbating all at the same time at one point, but that'll just disappoint you. If you really want to quit jerking off, first quit doing it as often as you are now and then gradually until you don't do it at all. Avoid also watching stuff that turns you on and find other stuff to do. You can't do this overnight, you have to discipline yourself and when you learn to do that, you'll get rid of your masturbating habit once and for all.