When we are mad!!!

Why is it that when we are mad at certain people, we tend at least to think on doing bad actions to hurt them, instead of talking things out?!!!

I've been having some issues with my partner for a while and I don't see an exit... We've talked, and talked, and talked, but as soon as we resolve something things get back as they where, or as if he didn't listen or talked at all!!! Is this a sign to end it? Or should I still try and fight for this 7 years relationship... I'm getting very mentally tired, can't concentrate on my work nor on my daily life... All my senses are becoming numb.

I'm running out of options here and don't know what else to do!!!