说白了你就是我的人说明了你就是我的命
[shuō bái le nĭ jiù shì wŏ de rén shuō míng le nĭ jiù shì wŏ de mìng]
Literally translates as 'Frankly speaking, you belong to me which means you are my life.' It conveys deep affection where someone feels so close and dependent on another person that this relationship has turned existential. That person has become the center of their world.