他未爱我至深我却视他如命
[tā wèi ài wŏ zhì shēn wŏ què shì tā rú mìng]
Translated as 'Though he did not love me deeply, I considered him as precious as life'. It shows the speaker has deep feelings for someone who did not reciprocate their affection as intensely. Reflects a situation where one person's emotional investment far exceeds another's.