I don’t know what to do

So I’m 16 and I’m struggling with fapping for like 4 years. For 2 years I didn know it was bad or something else but when I was 15 I realized that’s not good so I started no fap and that was 5 days 4 days my best record was 14 days clean but when I realized that didn’t work I started searching for another way to defeat my addiction from porno. I found a lot of ways like starting to pray more I’m Christian or don’t count days or uninstall every social media and I did this but the problem was the same lust the smallest sin but the hardest I’m 16 and all my friends always talk about girls and about you know so I think this is main trigger which causes that I can’t stop fap. Of course I train calisthenics for 2 years and boxing but always when I have nothing to do I have thoughts in my brain about fapping sometimes I can survive by usually I fail. So i ask you guys for help.