I can understand your dilemma, as it is a very common complaint for which lots of boys of your age come to my clinic.
Please understand that puberty
is the transition phase to adulthood and during which all secondary sexual characteristics undergo development. It includes an increase in sexual desire. Masturbation
is a perfectly NORMAL phenomenon in the adolescents. So, there is no need whatsoever of being ashamed of it. Further, masturbation has NO effect whatsoever, on puberty.
So, just relax and shed all your misplaced apprehensions, son.
Enjoy your adolescence to the fullest...and all the best