It was three years back I got married to my now husband after dating him for a year. Things were pretty exciting in the beginning. We just could not live without each other for a long time. But, this year, our relationship went through a harder time. We had a major fallout and we are fighting over every small issue every now and then. It appears that he is a totally changed person and I do not know him anymore. I do not want this relationship to come to an end. Is he cheating on me? Is this perfectly normal in a relationship?