你若离去后悔无期你若不弃我便相依
[nĭ ruò lí qù hòu huĭ wú qī nĭ ruò bù qì wŏ biàn xiāng yī]
This username expresses a profound dedication and dependence in love, meaning that if the person I love stays by me, I will be closely dependent on them; however, if they leave, I might end up regretting it for the rest of my life.