妞非你不娶爷非你不嫁
[niū fēi nĭ bù qŭ yé fēi nĭ bù jià]
'I'll marry no one else unless it's you' (expressed in two different styles: modern/neutral 'you' and old-fashioned/elitist 'you') shows unwavering dedication and exclusivity in romantic aspirations toward one particular person. It signifies an unyielding affection or commitment.