Move on. She probably already has you mentally filed as a "friend", and the low chance of success and extreme amount of effort required to pull that off just isn't worth it compared to how much you could potentially get by focusing your efforts on other girls outside of your social circle.
Also, if you're coming on here asking advice on how to get one specific girl, you've already lost her.
Also, if you're coming on here asking advice on how to get one specific girl, you've already lost her.