I can't bear it anymore...

I'd try so hard to communicate, but things doesn't changed. A message can be deliver in many way as why must she need to make people feel so dumb? and in the end, the atmosphere became tense and silent for a while, don't she realized the way she communicate was inappropriate? To be honest, I'm the one who experienced it. There is no point continue the conversation, and I can't point out her mistake right away (should be done by third party) as the consequence will end up quarreling. At the end, the person who are suffering is me, where the anger confine in body find no where to release. I wonder doesn't this fundamental courtesy should be learned by her age? I'm sorry to say, but I'm suffer too..