How can I impress this girl I like without going too far (12-year-olds)?

So my new crush is named Lindsey and she is beautiful with Brown eyes, flowing brown hair and her eyes twinkle when she smiles. The problem is she's not ready for a relationship (so what I wont give up). I want to impress her with a song but if you have any other, better ideas a 12-year-old freak could do to impress a girl like her, please tell me. Thanks.