My boyfriend might think I'm fake! ):?

hey I know reading this title really confused you all but once you read ,you'll understand.. So my names Shelby and I'm 14 yrs old. I just got my first boyfriend this year and I'm stoked :D he's perfect and he's my first guy. So I have naturally curly hair and I always feel ashamed to show it off. I only get to see my boyfriend at school because he lives far away from me and I don't even have a car to driver, and either does he. The thing is, that I ONLY go to school with straightened hair because my naturally curly hair is really frizzy and poofs up. If we go swimming or something, I'm afraid he'll see my real natural hair and he might think I was hiding all along what my real hair type was. And my hair straightened looks really silky and smooth, but when curly.. Ugh. I'm just nervous if one day we go to the beach or something, and he sees how my real hair looks like. What should I do!? ..