情到深处最孤独
[qíng dào shēn chŭ zuì gū dú]
'Qing Dao Shen Chu Zui Gun Du' (Loneliest When Feeling The Deepest Love) conveys a sentiment that when one's affection or feeling reaches its peak, there may be no response, understanding, or empathy from the object of those feelings. That unmatched emotion can lead to a profound sense of loneliness or helplessness.