我面无表情却爱你好深我孤僻成性却恋你好久
[wŏ miàn wú biăo qíng què ài nĭ hăo shēn wŏ gū pì chéng xìng què liàn nĭ hăo jiŭ]
Literally translated, it says 'I am expressionless but deeply in love with you; my personality tends to introversion but I have loved you for so long.' This represents hidden deep love and the contradiction in oneself.