Cold War

I don't like quarrelling, and cold war as well. Buta, it's inevitable. I'm not a Saint.
I choose latter, however, both of us got hurt more deeply in such "war". How come! We argued so fiercely while it came to such little problems. Was I too selfish, too straight forward? How to get comprised? I know how to deal with such kind of issue in business, but, I was really depressed in handling this situation, for we are so close. However, we seemed to be strangers to each other now...