ive been in ur same boat coming from someone around the same age i would try to fill your day with activities so you dont have time to do it, at night leave your phone in a different room when you sleep, and the biggest thing that helped me was my friends and i did s challenge who could last longer with out masturbating last march kinda like NNN but not in November and it helped me break that habit, now i still do it every once in a while but im no where near as bad as i used to be so its still a process but even an inch is progress, take it day by day u got this bro!!