Jealousy is a symtom that something needs to be examined. Sometimes it means that you need to look within and do some work and sometimes it means that there is something about the situation that needs to be discussed. It's a natural human emotion and a useful one. As time goes by I find that I feel jealous less often because there's a lot of things I have already worked through and talked through.
Everything will be ok in the end. If it's not ok it's not the end.