I didn't mention it because I was afraid of upsetting him/afraid (that) I might upset him.
我没有提起那件事，因为我怕他心烦意乱。
The drunk was upsetting all the other customers and the landlord decided it was time to show him the door.
这醉汉使其他所有的顾客心烦意乱，因此店主决定该把他赶出门外。
Stop playing fast and loose with that girl's feelings can't you see you're upsetting her?
别玩弄那姑娘的感情--难道没看到你已经把她弄得心烦意乱了吗?
