菇凉不爱你
[gū liáng bù ài nĭ]
This translates loosely into 'girl (referring informally to oneself) doesn't love you.' With a bit of humor and irony mixed in. The choice to call oneself ‘菇凉’ ('girl') adds casual cuteness, while emphasizing an unloving attitude towards someone - maybe reflecting on past disappointments in personal relations or just making a lighthearted remark.