Guys usually miss the girls they like. I do.
You don't have to be good at sports. Just do something to get noticed. If you're shy, try to talk to her when you're alone. Or, a good way to see it, just ask her what she thinks of you. Besides, you only live once.
It can work, but the best thing to do is to rub mayonase in your hair and leave it on for about 2 hours and then check your hair. If needed to, you can keep rubbing it with mayonase until the lice are gone.