Jealousy is coveting what you have. “The dog jealously guarded his bacon.” “The blogger jealously guarded his beer.” “The politician jealously guarded his dedicated Air Force commuter jet.”
Jealousy, curiously, is not listed among the Seven Deadly Sins, though it may follow from greed. Envy, however, has not been omitted.
Envy is coveting what you want. “The dog stared enviously at my bacon.” “The blogger stared enviously at his neighbour’s Lotus Seven.” “The politician stared enviously at everything everyone else has ever earned, ever.”
Now, if you use “jealousy” and “envy” properly, you’re unlikely to earn the devotion and admiration of everyone within earshot thereby. But people like me will notice, and approve, and thank the very bones of the earth for erudite and conscientious people like you whose command of the English language doesn’t make us want to carve out our — or your — eardrums with pickle forks.