I would not live until the fulfillment of his promise; time has betrayed me.

This couplet is a profound lament of despair. The poet feels that the betrayal wasn't just from the beloved, but from the very passage of time itself. He declares that he cannot live until the beloved fulfills their promise, suggesting that life's relentless march has already proven more treacherous than the promises made. It's a powerful statement about disillusionment.