Suggest Treatment For Enlargement Of Penis

well i am 15 years of age and i am getting near to the ages now were i am falling i love with girls and stuff and i have a problem with my..penis i have a 2.8inch lenth when erect and i have masturbated time after time but nothing seems to come up and all of the other boys at school talk about how "big" they are please ca you give me some advice as i am too embaressed to talk to my mom or dad about this thanks.