Maturity ......hopefully with age you'll grow out of it. <br />
Learn the difference between jealousy and envy. Jealousy bad, envy is okay. <br />
Practice controlling those those types of emotions. Face what makes you feel negative and tell yourself it's too much energy wasted. <br />
Good luck ! And remember, practice makes perfect !
Always having been a sucker for myself I never met a sucker I didn't like and find developing a sense of humor about suckers is a necessity, especially for those of us who don't have perfect control over our emotions. Well, ya gotta start gaining control somehow and a sense of humor helps to prevent people from losing control and ending up in prison or whatever.
Jealousy is not a good thing, it eats away your thoughts, time and energy. Hate is the same. Focus on good things that will benefit you personally and wish your rival well, as hard as it may be, so you can go on with your own life.