Monogamy

I saw an article the other day on one of the internet websites like Yahoo or something that posed the question is being in a monogamous relationship even realistic in today's society? I would like to think so because I live in monogamous relationships. I was never good at sharing as a child and I might even be worse now. I do believe in platonic relationships and my best friends are women and my two best friends are women I used to date. I never even bothered reading the article because the dating world, especially at my age, is hard enough without wondering if the woman I am dating is only dating me. I am not a firm believer in casual relationships but I guess I may need to become a believer.