Just started school and I like a girl

Hi, I have 14 years old and im from italy. Im not the most beutiful person in the world. Im 1.70m and weight 80kg. So how can you guess im pretty ugly, the point is: I like a girl that do my classes and I've known her for a week. She is literally my dream girl. What should i do? Should i wait? Should i ask her out?