喜欢不该喜欢的人
[xĭ huān bù gāi xĭ huān de rén]
Falling for someone who you should not fall for. This phrase indicates the struggle or frustration of the person who fell for a person who is perhaps not appropriate as a love interest for different reasons like being incompatible, taken by someone else or having irreconcilable gaps in their background or beliefs.