It depends on the reason why you want to win. If your aim is to get him in romantic relationships, then do not waste your time. Fuckboys are simply not made for that. In case you want to take revenge, then to beat the fuckboy at his own game, you need to stir up a strong desire for you in him. But be sure to never give in to him. Otherwise, once he gets you, he will lose interest in you and you will fail. Also, remember three important components that will help you to win: confidence, ego and boundaries.