我爱他三年前他爱我三年后
[wŏ ài tā sān nián qián tā ài wŏ sān nián hòu]
This translates to 'I loved him three years ago, he will love me three years later.' It implies a regretful or melancholic feeling of missing out on true love because timing didn’t align. It suggests unreciprocated feelings with the hope of them changing in the future.