孤独久了幸福开始恐慌了
[gū dú jiŭ le xìng fú kāi shĭ kŏng huāng le]
This can be translated as 'Long-Term Loneliness Makes Happiness Start to Panic'. This expresses a sentiment where extended periods of solitude cause a person to feel anxious or insecure even when they are supposed to feel happy.