What to do if i want to stop my masturbating addiction how can i stop?

Get with your doctor: I'm going to assume that you have an obsession with erotica that is interfering with the things you need to be doing -- job, friendship, learning, fitness. Just entertaining yourself a few times a day like most everybody else isn't an "addiction" and only an ideologue would have issues with this. If you're truly in trouble, you'll know it. Your doctor knows how to treat / refer you. Cheers.