你不是洋葱没资格让我流泪
[nĭ bù shì yáng cōng méi zī gé ràng wŏ liú lèi]
Translating to 'You’re not an onion and have no right to make me cry', this conveys the speaker’s unwillingness to be emotionally affected by someone who doesn’t genuinely impact them like real feelings can.