三年后等一个不确定的未来三年前为你而拒绝所有暧昧
[sān nián hòu dĕng yī gè bù què dìng de wèi lái sān nián qián wéi nĭ ér jù jué suŏ yŏu ài mèi]
This translates to 'Waiting for an uncertain future three years later, three years ago I rejected all flirting for you'. It expresses a deep sentimentality over a past relationship that was chosen over casual encounters but with no surety of the outcome.