This feeling wasn't about Qin Lang not keeping his promise to marry her. It was about getting abandoned after all she had put in, after giving and not getting back what she deserved. There was a strong sense of discontentment and resentment.
Why is it that even after all that she had done for him, even after giving up so many years of her youth, all of her expectations suddenly came crashing down?
If Qin Lang had directly told her that he wouldn't marry her, maybe Xu Feifei wouldn't have been so devastated. What hurt her was that Qin Lang wanted to get rid of her, a feeling that was even worse than being abandoned.
Moreover, she didn't want the man she poured so much thought into to be snatched away by another woman.
Resentment radiated all over Xu Feifei's body; she despised Shen Dandan and Qin Lang. She despised all women who lived a better life than she did.