What is a good approach for a girl who's boyish?

i like the personality of this girl..i find her catchy..she's boyish but very pretty and doesnt talk much... i find her cool i mean she's boyish but then i saw her once joining the flores de mayo ( a parade where the most beautiful women are chosen) after seeing her that way i adored her more from being boyish to the elegant girl i just saw.. how to approach a boyish little bit snob girl.. ^_^