You should look after yourself well when I am not with you.
其他两位的也可以,这句话多种翻译。摘录如下:
When i am not being on you, you have to take care of yourself.
I am not with you,you must be OK.
I am not with you,you must be OK.
When i am not being on you, you have to take care of yourself.
When i am not being on you, you have to be good (happy, 或alright)
take care when i am not with you