我太自私不让你喜欢他人
[wŏ tài zì sī bù ràng nĭ xĭ huān tā rén]
This roughly translates to 'I'm too selfish not letting you love anyone else'. This nickname might reflect internal struggles over possessiveness and control in relationships, confessing personal shortcomings while showing awareness and perhaps regret towards jealousy or insecurity issues.