Yue Xuexia had a clear line for her likes and dislikes. If she likes them, she will treat them as the most precious. If she hates you, she will kill you no matter who or what you are. However, if you are a stranger with a bad relationship with her, as long as you are not her enemy, you will be forgotten by her for good. She will treat you as if you didn't exist in her life.
The relationship between Si Lengya and Yue Xuexia actually used to be good when they were still together. However, after Si Lengya betrayed her, Yue Xuexia chose to leave and their relationship broke apart. There might be some other reasons for their break up. It can be because of family, studies and anything. However, since none of them chose to chase the other, the relationship fell apart and they had separated ways.
