Behind her back?

A 10th grade girl, peering around the age of 16, begins to admire a boy of popularity, good looks, and a beautiful personality. Unfortunately not being at all being apart of the "popular group" or even having someone to vent to, she wouldn't have even dared to think that he could've been interested in her. But again, she didn't necessarily know for sure. Since he had been neglected by his inconsiderate and unethical-acting girlfriend, he has seen the lonely girl around, well, more than once. He gazes at her at lunch, in his classes that she partakes in, and when she walks home. He has even searched for her simple social medias just to scrutinize her face much more. Not too long after he realises his immense feelings for her have grown enough for him to think about beginning to develop the emotion of deprecating his girlfriend, he has found out from a couple of his so called 'buddies' that she had done the dirty deed of cheating on him more than once. That didn't leave him heart-broke however. That made him closer to his admirer, receiving a higher "rank" from her everyday as he spoke to her, hung out with her, bought her lunch, just cute stuff like that. Soon they become one, and happen to be a powerful couple.