Jealous

adjective

1. Suspecting rivalry in love; troubled by worries that one might have been replaced in someone's affections; suspicious of a lover's or spouse's fidelity.
2. Protective, zealously guarding, careful in the protection of something one has or appreciates.

   "For you must not worship any other god, for the Lord, whose name is Jehovah, is a jealous God. —Exodus 34:14 (NET)"

3. Envious; feeling resentful or angered toward someone for a perceived advantage or success, material or otherwise.
4. Suspecting, suspicious.