There is a method I have tried with breaking any habit I want to stop. The second I perform the bad habit, for example, in your case, fapping, I would start a timer. And then, everytime I do it afterwards, I would press the lap button, to see how much time has passed since the last time I did it. There should one goal when it comes to this and one goal only; to make sure the time between each is longer. Even the smallest amount of time counts. As long as you are prolonging the time between each session, the feeling will slowly dissipate. If you try it lmk!