小子非你不嫁丫头非你不娶
[xiăo zi fēi nĭ bù jià yā tóu fēi nĭ bù qŭ]
A romantic statement 'Young man won't marry unless it's you and young woman also won't marry except for you either', showing a profound and devoted feeling to another person. It’s like a declaration of undying love and devotion for only one specific person.