Don't be such a god damn beta, if she shoots you down don't make it all awkward by being all sad and shit just be like oh dang alright that's all good and move on. Otherwise the whole school will think you're a beta then you get stuck in a shitty position for the next four years.
Just be alpha as fuck when you ask her and alpha as fuck no matter what the answer is otherwise you're going to ruin your social life if she's popular.