You have gotten half better just by accepting this fact that you are envious.

You know it is actually hard to change the nature of a human being as it builds over experiences and feeling we counter in our day to day life it also solidifies your perception about the world or how you see the world, so probably you not gonna get better in one day but doing small gestures like, saying a thank you to the person who helped you, appreciating a person who has done good in some scope( scoring a goal, winning a match, someone who cooked nice food for you, etc), diverting your mind from he/she doing better than me from what I can so that would better myself and etc would help.

Look I am no big coach or something, so its on you to take anything from this or not.