Learn to love all the things of the world, just as means but don’t get attached to them. This is the secret—the philosophy of non-attachment.
When the senses are well-controlled and withdrawn from contact with the objects of the world, then sense perceptions no longer create images in the mind. The mind is then trained in one-pointedness. When the mind no longer recalls thought-patterns from the unconscious, a balanced state of mind leads to a higher state of consciousness. A perfect state of serenity established in sattva is the highest state of enlightenment. The practice of meditation and non-attachment are the two keynotes. A very firm conviction is essential for establishing a definite philosophy of life.
Jealousy is an evil which grows in the womb of ego and is nourished by selfishness and attachment.
If you really want to enjoy life and be happy, learn to practice and understand the philosophy of non-attachment.