“安静就好......”用英文怎么说？

Just be quiet and that's all.

nothing is needed. just be quiet.

just quiet is enough.

you don't need to do anything, but keep quiet.

"Everything does not need, just as long as quiet ..."

just be quiet

Nothing but quiet is needed.

如果这句话是说给自己听的，那么："I want for nothing, I just want to live my life in peace."

如果这句话是说给其他人，类似于一个“命令（Command）”的语句，那么："I want for nothing, please leave me alone." 或者"Please don't say anything, I just want to be alone."