If you're still in school and on good terms with long-haired female classmates, compliment on their hair, how it makes them look pretty and (if they always wear it up) how you've always wondered what they look like with their hair down.

If you're polite and respectful about it, you might get the chance to play with their hair, as I've been lucky to have done when I was your age.

(But remember to respect their boundaries - if they say no, they mean no. Move on to the next girl)