难不难过一个人过心不心疼一个人疼
[nán bù nán guò yī gè rén guò xīn bù xīn téng yī gè rén téng]
'Hard not to grieve when passing days alone; Can’t avoid caring when causing pain oneself'. Reflects loneliness and self-inflicted pain and care simultaneously, revealing inner sorrow yet also independence.