Who doesn't want to be successful in life? Money, fame, and recognition are what everyone wants but not everyone gets everything. And it is this unequal distribution curve that makes people envious of each other. People often get jealous of others' success. I was one of those people too at some point in my life. But life has taught me one thing Life Is Not A Zero Sum Game. Someone else's success doesn't mean your failure and someone else's failure doesn't mean your success. My friends taught me how to celebrate others' success without being jealous. Since then I have started competing with just one person, myself. My friends are the biggest supporters I have got and I have learnt many such life lessons from them.
I want to conclude this by saying that the moment you feel jealous of someone is the exact same moment you stop learning from that person.