Jealousy is often a sign of codependency. On the flip side, it is a sign of the need to dominate another person. If your personality has codependent tendencies or is antisocial and seeks domination over others, then, yes, jealousy can feel good to you. If you're in a sick love relationship, then jealousy also can feel good. On another note, frenemies is one of today's most poppular jealous relationship, where you hate your friends' accomplishments but still stick with them. Of course, there is jealousy of winners if you're a loser. But I don't ever hear much about jealousy motivating people to overcome their deficiencies and then accomplishing anything. So, in the end, I think jealousy is not a good thing. I'm kmow, other disagree. They the one's who say love is suipposed to hurt and that if he doesn't get angry he doesn't love you. But that's all just immature thinking.