我的世界只许有你我的心里只许装你
[wŏ de shì jiè zhĭ xŭ yŏu nĭ wŏ de xīn lĭ zhĭ xŭ zhuāng nĭ]
This translates to 'My world can only have you; my heart can only be filled with you,' reflecting a deeply romantic sentiment that the person’s entire existence revolves around this loved one.