YGirl, that is exactly my definition of jealousy versus envy. But if I find myself starting to feel defensive to someone's envy, then the problem is mine, not theirs.
Jealousy is definitely a destructive force to all parties in a relationship. When I have jealous friends, I work just as hard to address it as I would with a jealous partner. If it can't be resolved in either case, then there is something very broken.