I'm 16 & my boyfriend is 19. Help I need girl advice.

I am 16 years and and my boyfriend well obviously according to my title is 19. how in a way could I make my parents understand that he's not just with me to get in my pants. I am still a virgin and plan on staying like that till marriage and he knows and supports me. I really like him honestly yea I'm too young to know about love I guess but, how could I make this work? And show him I care too.