for me it's all about the last couplet, where he flips it from being about his adoration of the person he's addressing to being about his amazement that this feeling he's feeling might be shared, that the other might love him just as much -- i think anybody's who's ever been deeply in love has felt those moments of utter disbelief that it can possibly be real. perhaps it's that love seems to be the thing that can most completely bridge the distance between us but at the same time relies on a kind of faith, a faith that also embodies an essential and unanswerable mystery, like god or truth: "what makes you love me as much as i love you?"
for me it's all about the last couplet, where he flips it from being about his adoration of the person he's addressing to being about his amazement that this feeling he's feeling might be shared, that the other might love him just as much -- i think anybody's who's ever been deeply in love has felt those moments of utter disbelief that it can possibly be real. perhaps it's that love seems to be the thing that can most completely bridge the distance between us but at the same time relies on a kind of faith, a faith that also embodies an essential and unanswerable mystery, like god or truth: "what makes you love me as much as i love you?"