Usually jealousy comes when we feel like there's something alcking in our lives that we see in other people. Perhaps it would be useful to analyze your feelings using this perspective. Can you recognize what exactly are you jealous about? About their work? Their romantic relationships? Anything at all? Try to give a thought to that. If you still can't figure it out I'm sure there are plenty of self-help books on the subject. You may look up for the best ones. You may even consider seeing a therapist if you feel like that's what you need. Wish you the best of luck with your decisions and your life! Hopefully you'll be able to use your energies to strive for better goals and improving yourself like Aviza said. I also agree with mote.of.soul about this being possibly related to your self-esteem. Just a thought. Keep fighting! Sending many safe, warm hugs to you, ppkspt, and to ALL the people you Love and who Love you!