我向来三分热度却爱你好久我一向孤僻成性却念你好久
[wŏ xiàng lái sān fēn rè dù què ài nĭ hăo jiŭ wŏ yī xiàng gū pì chéng xìng què niàn nĭ hăo jiŭ]
This can be interpreted as 'I've always been only enthusiastic for a short time but I've loved you for long; I'm introverted by nature but I've missed you for so long'. It shows deep and long-lasting feelings toward someone despite the character's usual short interest span and tendency to be lonely.