我染上了一种病叫无药可救
[wŏ răn shàng le yī zhŏng bìng jiào wú yào kĕ jiù]
Translating directly it reads 'I got infected with an incurable disease'. In a figurative sense, this indicates the speaker fell into some deep, irreversible situations, possibly referring to intense, unbreakable feelings or thoughts, usually in love.