你在心深处不愿与他人分享
[nĭ zài xīn shēn chŭ bù yuàn yŭ tā rén fēn xiăng]
Directly translating to 'You are in the deepest parts of my heart, where I do not wish to share with others.' This signifies deep affection towards someone who is held dear and precious, so close-knit and unique that it's hard to let others enter this sacred space of the heart