My best friend tells me that I am silly to be upset about this.

我最好的朋友说我为此事心烦太傻了。

《柯林斯英汉双解大词典》

He seems to be upset about it.

他似乎为此充满忧虑。

youdao

You could not be upset about anything on a day like that.

在这么一个日子里，什么事情也不会使你烦恼的。

youdao

"We are not really upset about it, but what is psychologically disturbing is that people can be annoyed or feel insecure at the slightest differences that appear,"

VOA: standard.2010.02.24

And you know, people can be upset about it but this is the decision I made.

NPR: Black Conservatives Torn Between McCain, Obama

The only people who should be upset about this new crowdsourcing trend are Sony, Microsoft and Nintendo.

FORBES: Why The Oculus Rift Kickstarter Is A Better Bet Than Ouya

And I can't believe that your guest has said that he thinks that firefighters would be upset about this.

CENTERFORSECURITYPOLICY: Transcript of CNBC Divest Terror debate