为你傻到自己伤心为你傻到自己痛心
[wéi nĭ shă dào zì jĭ shāng xīn wéi nĭ shă dào zì jĭ tòng xīn]
The phrase can be translated into 'To be foolish for you until I made myself sad/pained.' Expresses dedication at cost to one's own wellbeing. The speaker indicates they have been deeply affected by the recipient.