承诺太多让你难过是我的错

Translates to 'Too many promises have made you sad, and it's my fault.' ('Chēnnuò Tài Duō Ràng Nǐ Nánguò Shì Wǒ De Cuò) Expressing remorse, this implies guilt arising from failing expectations set upon oneself, leading to sadness or harm for another, especially close to them like friends or partners.