What would u do to show him you like him?> besides Flirting!?

This is like a typical love story. Well i met this guy at camp, we dont talk that much but he stars at me ALOT i mean ALOT! like i look back hes staring at me. But we went on a trip and we had a bus he was behind me and everyone new i liked him but him so they wer like "Hey! Do u like Sami" he would ignore it but my lil bro is his bestie and he said that John said that he secretly has a crush on me. I was thinking about riting a note but that would take some though nerves. Any ideas?