你以为你有多难忘这是你没心没肺
[nĭ yĭ wéi nĭ yŏu duō nán wàng zhè shì nĭ méi xīn méi fèi]
The username is quite expressive. In a sense, it says: 'You think you're unforgettable? That just shows you lack empathy.' Here, the owner implies a criticism of others who have hurt them, thinking highly of themselves.