Can too many masturbating could affect the fertility?

Not long-term: If you ejaculate often, there will be less resorption of fluid so the sperm count will be a bit lower; nobody's showed, and there no scientific reason to think, that this will interfere with fertility. Life's hard enough without a bunch of scare stories. Think about the girl you'll marry, and perhaps talk with dad about growing up. Embrace being / becoming an adult.