Jealousy: How To Keep It From Destroying Your Relationship

Jealousy. What is it? Anger and resentment created by fear that someone will make us feel inadequate because they appear to have something we desire but believe we do not have.  Jealousy is a manifestation of ones own sense of inadequacy, and when it surfaces, it can destroy relationships. When we fear that someone has affection for another and we feel jealousy, how do we address that situation? How should we address it? Are we truly responsible for other people's jealousy? Or is this an emotion each individual has to eradicate within him or herself?