Cant blame a guy for being nervous dating a girl too hot for him. Its intimidating at first, because at 15 you don't know that the dating pool is really full of wanker jerkoffs, and this chick, no matter how hot... really can't do better. She's lucky you're interested and thank god for that ass because if she didn't have it you wouldn't be interested and she'd be dating this guy, because she doesn't know any better: