你眼中有片海始终不为我蓝
[nĭ yăn zhōng yŏu piàn hăi shĭ zhōng bù wéi wŏ lán]
It describes a situation where someone feels that although there is a deep sea in another person's eyes (indicating depth of emotion), it never turns blue for them (blue symbolizing calmness and intimacy). This conveys longing and unreciprocated feelings.