How the urge of masturbating started in my life at 14years

Back in 2017 when I just gain admission into the junior secondary school, there was these two brother who was also admitted to same class with me! There nice and generous, we all both play and joke together, then me always being that person person anyone could relate to, me and these two brothers became more closer outside school, later finding out they even lived closed to me that's when they start visiting me at home, then we became more closer as friends, school mate and neighbors!
Not quite long about 6 months prior, I noticed that these two brother where so generous that almost every girl in the class joke and play with them! That's just when everything changed and because of that interaction they now have with the girls, they kept on saying naughty words when am with them talking about every girl they play with in class, and then just because we were young we couldn't get closer to the girls part from being class mate, the only thing we could get access to, was a phone and a internet connection. And that's where everything changed, me and these two brother with some other male class mate often went to my house, then locked in, in my room browsing about n**ked girls and we'll watched and laughter over it and they'll went home, living me at my apartment so bored! All I thought was just to visit the website and start browsing and watch videos alone, I downloaded these video, watched series of these video 4 to 5 times a day, feeling some urge but don't know what to do please the pleasure and these things continue like this for a month or two, then one night been alone in my room, the urge while watching these videos Increase then I did what not supposed to be done! And since that day everything changed!

That's how the whole stuff started, I will be dropping the rest part of the story every