眼睛不能失去泪水而我不能失去了你
[yăn jīng bù néng shī qù lèi shuĭ ér wŏ bù néng shī qù le nĭ]
The eyes need tears like one can't do without the other. It metaphorically says that someone is as essential to this user as tears are to express emotion - indispensable and deeply emotional.