我爱上了恰好你不爱我的你
[wŏ ài shàng le qià hăo nĭ bù ài wŏ de nĭ]
Translated as 'I fell in love with you at a time when you did not love me back,' which reflects on a painful reality of loving unrequitedly. The sentiment here involves deep love from one side and the disappointment and heartbreak when that love is not reciprocated by the other party.