若不爱谁管你情深似海
[ruò bù ài shéi guăn nĭ qíng shēn sì hăi]
This expresses a dismissive feeling toward deep emotions or unconditional love from someone who is not loved in return. It indicates that unless there is mutual affection, one does not care how deeply another person is infatuated. A sort of protective mechanism against unwanted emotions.