What do i do!!!!!!!!!!!!!!!!!!?

ok so im goin out with this guy a really like weve been goin on for 3 almost 4 months nd i really like him. im only 13. i told my dad about it nd he said im to young to be datin n he doesnt want me to my sister agrees with him. idk wat to do he said he wants me to break up with him but i really like him. weve had lots of fun times together. should i break up withh him n listen to my dad or try to get things straight with my dad to let me date him.. if so then how to i get my dad to let me date him?