I, personally, don't feel anything when others fight or are sad or angry. Sometimes, I feel almost like I should laugh in their face at their ridiculous feelings of importance. As a veteran, I guess I have a very different idea of what makes a person sad, angry, upset etc.
It might sound arrogant, but I almost feel like I have that right - to feel like their problems are nothing. And to protect myself, I try not to feel apathy because then I will be hurt along with the other person. It is better just to feel numb to it. Distrust is your best protection in the world against being betrayed.
I guess this didn't help, but I hope you know that we understand.