一天你还未结婚我就不甘心
[yī tiān nĭ hái wèi jié hūn wŏ jiù bù gān xīn]
This conveys a strong feeling of competition or dissatisfaction until something happens, translating to 'As long as you are not married, I am not willing'. It might be used by someone vying for another’s affection persistently.