习惯偷偷爱着你用尽我全部勇气
[xí guàn tōu tōu ài zhe nĭ yòng jĭn wŏ quán bù yŏng qì]
'Accustomed to secretly loving you with all my courage.' Conveys the hidden deep feelings and efforts put into loving someone without exposing those feelings, often associated with unrequited love.