你怎么那么多事，也可以说成：“关你什么事”“管好你自己的事儿”
Care about your own business 关心你自己的事情吧
It is none of your business 不关你的事。
你真的很麻烦 You are really boring/annoying.
希望能帮到你！谢谢！
追问I meant like when you're waiting for a friend, and she keeps doing one thing after another.
追答You are a big trouble!