According to www.merriam-webster.com:
Definition of JEALOUS
1 a: intolerant of rivalry or unfaithfulness b: disposed to suspect rivalry or unfaithfulness
2: hostile toward a rival or one believed to enjoy an advantage
A Signal to Look Within
Jealousy is an extremely painful emotion; social exclusion, whether real or imagined, always hurts. It throws the mind into turmoil and is difficult to dislodge. ... there are huge individual differences in the propensity for jealousy, and there is emerging evidence that elements of personality influence some of them. Those who are most insecure, in fact, may be most unrealistic in perceiving threats and making accusations. But this same view of jealousy also suggests that the emotion need not be unleashed on a destructive path; it can instead serve a highly constructive purpose—as a valuable signal to look within and repair one's own sense of self. That, in turn, can only improve relationships. Jealousy, it seems, says more about the bearer than about the deeds or misdeeds of [others] ......
Yup. Take it for what it's worth.