Most Helpful Guy
It's because a breakup is painful because you're angry about having invested your feelings and it gave Nothing. So you want to stop investing into someone, you want to get your revenge for yourself and maybe you look to outperform the one that broke your heart. A breakup, particularly a bad breakup can also be humiliating. So you clean the offense by improving and getting somewhere at last. A breakup can give a lot of energy through hate, and congrats for using it so constructively.
Most Helpful Girl
It's funny that you asked this because that's exactly what I'm doing now. The reason I'm doing it is well my boyfriend j think left me for another girl or he was cheating on me and I wanna look better and do better because when I post things on fb (I have him on fb) and then maybe he'll regret letting me go and be like I shouldn't have let her go and that makes me feel good in a way of that mKes sense lol