久居深海孤独成性长留天际相思成疾
[jiŭ jū shēn hăi gū dú chéng xìng zhăng liú tiān jì xiāng sī chéng jí]
A poetic expression indicating someone living alone at sea has formed the habit of being lonely and yearning, even to the point of becoming unwell. This can describe someone who suffers silently in longing.