When trying to become friends with a boy when your friend has a crush on him, you must overthink every step. Anything could look like you like him, from a giggle (reality: you do that all the time for no reason) to brushing your hair back (reality: it was windy and your hair was blowing in your face) to playing his favorite song again on your iPod when he asked (reality: it's your favorite song too, go figure!). If she gets mad, just tell her you think they'd be cute together. That'll turn her around or at the very least shut her up.