What Are the Perils of Jealousy ?

In reality, jealousy sometimes makes people become eccentrically misbehaved. In my opinion, I think that jealously is one of the most severe factor that demolishes good relationships among people. From my experience, I had a pretty good relationship with a friend until we realized that we were actually competitors. I remember that I failed the last stage of the test because of him telling the teacher that I was cheating, which was not true. Such a great disappointment has never vanished in my mind. Now I can understand that friendship or other relationships can never last long if integrity and honesty are shown to one and another. Jealously is everywhere, in my thought.