我本薄情却钟情于你
[wŏ bĕn bó qíng què zhōng qíng yú nĭ]
Translating to 'Although I'm fickle, I have fallen in love with you' or more literally 'My indifferent heart chooses to adore you only'. This signifies someone whose emotions tend to fluctuate but has deeply fallen in love with one specific individual.