What's wrong?

I already fade up... I can't control... And, I cried. I really cried... I feel that I am a useless person. What's wrong? I always ask question but to nobody.. Of course, I didn't get the answer... I remember she said,"All "A"s, so what? All "A"s so can be proud?" I don't know what she's thinking. But I just know that we study to get "A"s, but we are not the proud ones... We never ever do this silly things before... And I also want to ask her,"he already kneed down and say sorry, what you want to do to him then? And please be clear, he is a boy. He can do this, then why you are still angry? You make me felt shame." I can't imagine this happen... But it really happen. What's wrong to this class? No hope anymore? Talk all this, just waste my time. But make me feel better...