I came across this page Couple's Communication during my random perusal of the Internet. It is basically an article on the different ways a man and a woman perceive the same conversations. What a person says and what the other person hears are often very different.
Way back, when the book "Men are from Mars and Woman are from Venus" was popular a friend and I used to joke that we could have become wealthy if we had just written that book. We believed it could be summarized with just the words - "Men, Women - different." Of course it is obvious and we've all read and discussed and laughed about the differences between the genders but getting down to the day to day interactions we often forget the obvious. Try giving the other person the benefit of the doubt. Try not assuming the other person is being negative. Stop. Listen Carefully. See what happens.