I felt betrayed for the second time.

Last Monday night, I was given the task to edit my friend's work. It's with our thesis. Hmmm... I thought that I was only going to be finished by an hour because I thought that the paper's ready. Ready to be published. When I go through with it, it was very lousy. So I have to edit it and told my friend that I have to overhaul her paper, because it has a lot of mistakes. Morning came, she became too bitter. I asked her if she was angry; she told me that she's not. Then, I saw her post on Facebook. She posted that she got so insulted and all. But what can I do? The paper's bad. I have to edit with most especially with grammar. During our peer evaluation, she gave me a low grade. She's telling me that she's okay, but then she gave me a very little score. I contributed a lot to the group and all she did was to ruin it.