掏心掏肺喜欢你那么久
[tāo xīn tāo fèi xĭ huān nĭ nèi me jiŭ]
The phrase describes deep and intense affection for someone that has lasted a long time, literally meaning 'pouring one’s heart out in liking you for so long'. It conveys the feeling of having sacrificed everything emotionally for another person without reciprocation.