Anger

Suddenly the red mist rises and your anger starts to surface...How could he do this to you?

You run things over and over in your head a hundred times, making him out to be a monster for what he did. You want to show him up for the low-life he is, and this is a natural reflex. However, take care it doesn't lead to vengeance, which could blow up in your face and involves further contact with him, which is not what you need right now.