How can i stop masturbating alot// cuz it stops me from day activities?

Schedule: Have a schedule of things to do. Keep busy. Find a hobby (another hobby). Prioritize your tasks.

Get seen: Usually in young men this is coupled with a porn addiction. While all men and many women enjoy erotic images, getting obsessed with this stuff so that it takes you away from the other good things in life is something that needs to change. A low dose of medication and a few sessions of good, clarifying talk from the right person will probably make your life far better. Ask your physicain.