My advice is...
If you leave the thought alone, and you will be friends... just friends. Soon she will grow other and blossum into an adult. Eventually she will be tossed into love's game with another person, whether she likes it anot.

But if you risk it... you might just get the chance to be with her. Perhaps, asking her out like some have advised, going on mini dates and eventually blossuming into a close and steady friendship would be ideal if you don't want to scare her away.

Last of all, talk to her and ask her what she feels about relationships. It might just help you after all.