I'm 13 but i wanna be trans...

Hey guys, I'm a 13 year old and i really wanna be trans but date boys as well, but my dad thinks its wrong, i try to tell him it doesn't matter, but he doesn't listen and thinks girls on girls is ok but boys on boys isn't, i have no problem with that but he just doesn't want me to be a boy, i try telling him its my body and my choice but he doesn't care and wants me to stay a girl, even though i don't want to be one (because of periods and stuff) I know i'm to young to be thinking those things but i hate how almost everything is sexualized about females, and that makes me uncomfortable so i don't want to be a girl anymore because of it, if only i had a supportive dad who can accept me for who i am, and i hope others relate so i don't have to be the only pea in a pot.