I really don't care whom you are.
我真的不在意你是谁
我真的不在乎or
我真的不在意
参考资料：||
I really don't care whether you are happy or not today,but I do hope the ongoing war worldwide could be stopped.
我不在乎今天你高不高兴，但我真心希望现在世界上的战争能停止。
I really don't care you.
我真的不喜欢 你(不关心你).
我真的不介意