IM A BOY SO I SHOULD KNOW. TELL HIM U LIKE HIM THEN WALK AWAYE.
IF YOUR CUTE IT SHOULD WORK I think the best way to steal the attention from another girl is to just stand out! Be yourself and let the unique things that make you, you SHINE! Walk up to him while he's talking to her and lightly squeeze his upper arm. He should instantly bring his attention to you... smile, have something funny or interesting to say when he looks, and hold that conversation. Keep it upbeat, fun, and interesting and make sure while you are talking you make NATURAL, light physical contact. Touch his should for a couple seconds when you have a story to tell. IF HE IS NOT FEELING YOUR EFFORTS... Do not over stay your welcome, be classy and have the sense to end an awkward situation/conversation and set your sights else where!