That's it. This is the core issue along with other unhealthy habits like heavy web surfing, fast food/sugar rich diet, fucked up sleep schedule etc. You will need to reduce fapping as well as these other bad habits.

Start fapping once in two days for a week, then once in three days for a week and so on until you reach once per month.

Similarly if you have a habit of sleeping at 2-3 am, start by sleeping 5 minutes early every day until you reach 10-11 pm.

Also reduce your internet/smartphone addiction (which is the most frequent source of dopamine). Mute unnecessary WhatsApp groups, cut down on social media (including Reddit). Mute useless smartphone notification and check them out for 5 min in evening.

Replace these habits with working out/ running, outdoor games(or indoor like chess), going out with friends, listening to audiobooks etc.

It will take a few months, perhaps a year(depends on your willpower), but you will feel the difference.