I used to worry when I saw someone’s cool work or someone very talented. I’m not sure there was an envy element, but rather reflection about my place in the top of all people.
Now I think there is no top-list. And although people compete with each other, there is no competition in reality. When you achieve success, you don’t deprive others. Or if a competitor presented a cool feature before you, he did not limit your ability to do the same or better.
Don’t compete, don’t compare. Do cool stuff just because it’s much more interesting.