爱你成瘾心无悔欺你成病仍无泪
[ài nĭ chéng yĭn xīn wú huĭ qī nĭ chéng bìng réng wú lèi]
Expresses being so deeply in love with someone that one feels addicted without regrets, and being hurt by them to a point of illness but still no tears, reflecting intense emotions and unconditional love.