Who has not ever wanted that somebody else has? The fact is that you don't like having or feeling less than. It makes us uncorfontable, feeling resentment maybe. Researches have shown that our brain actually registers envy as the pain. And, if you are normally constituted, I imagine that you do not wish to keep and to store all these destructive and painful envies.
The 1st crucial stage is to simply being able to label what is going on in your thoughts, emotions and body. As you familiarize yourself with your own signs, then you have choice : How do I prefer to react now ?
To familiarize yourself with your inner signs, a relaxation therapy like sophrology is a precious help.
Ask yourself why you are envious in this situation ? How does it sounds for you especially ?
What can you do to get ride of this envy ?
Some people imagine having what they desire. Investigating all the aspects, putting them virtually in the situation. Then confronting the situation with their values, their personnality and their way of linving. And then ask themself if it's really waht they want.
Be creative, the choice is in your hands. Don't let yourself invade by envy.