Firstly, congratulations for being able to openly express your feelings, being so honest, and asking for advice.
Very important: understand that those feelings of jealousy are totally normal in that environment and at that stage, so there is absolutely nothing wrong with you.
No matter what people try to sell you, particularly the ones who already have a position where they don't need to compete, a research lab is a highly competitive environment and you are constantly being evaluated. There is constant pressure. People work there to accumulate merits and build a CV, so it is normal that you believe, at first glance, that this is a zero-sum-game and when someone accumulates a merit, they have moved a position in the game and you haven't.
Many people will try to make you feel bad about those feelings, but that's how it is and most of us have experimented it, particularly at the beginning of our careers and in very competitive areas. It's just that most people will never reveal those feelings, or only do it with people they really trust, because people immediately tag them as "negative", "jealous", etc... and no one wants to be called that.
Jealousy is the basis of competition and free market and it leads to great things, like better ideas and products, when managed properly. There would be no great thinkers, companies, or products, without jealousy.
So, the key is to learn how and where to focus that energy.
My advice would be the following:
- Try to forget about what others are doing and focus on things that you like / think are worth researching. Are you really jealous about that guy that published something about a topic you couldn't care less about? I don't think so.
- Be very careful about collaborations. Particularly at the very beginning of your career and when you are under constant evaluation, it is frequent that misunderstandings occur. You still don't know the rules of the game, so only collaborate with people you trust and try to clarify everything since the very beginning (responsibilities, authors, order, etc). This is one of the biggest points of resentment at the beginning of a competitive career.
- Focus your energy on becoming a good researcher. As suggested above, read books on how to research, how to write, do a god job, and be proud about it. The number of publications a person has, their length, or even the journal or venue, is not automatically a guarantee of quality and hard work. Sometimes, it turns out to be the opposite. You will get that pretty quickly.
- Surround yourself by the people that you truly "envy" because of their capacity and hard work, ask them questions, etc... good researchers are usually willing to help and teach others.
- Run away from those who you feel are getting merits unfairly or have dubious ethics, or you will either become like them or have a hard time. You know: groups where one person does all the work but others are automatically added as co-authors, etc, etc.
In any case, congratulations again for your honesty, and good luck!