我本三分钟热度却爱你好久
[wŏ bĕn sān fēn zhōng rè dù què ài nĭ hăo jiŭ]
'I Have Three Minutes of Enthusiasm But Loved You for So Long' conveys the depth of affection and commitment, despite the person only maintaining short-term excitement for things typically. It shows that the love here was an exception—unusual and deep.