Do any of these apply to you?
Some people like to share; some don’t, and that’s fine. Some people are just there to work and get paid. Is it really important to you to know a coworker’s personal story? Is it a way of deflecting attention from what you fear is your own boring or disturbing narrative? Do you immediately switch into retribution mode when your overtures are ignored?
Turning a workplace against someone is especially cruel. Bad-mouthing a coworker to the extent that no one’s comfortable befriending them can make that person’s workday totally miserable. Alliances at work are a critical element in making someone feel part of the team. Does doing this make you feel in control or like you have power?
When a new hire is a good one, do you feel threatened by how much others like the newbie and appreciate the quality of their work? Are you counting on the same positive attitude that everyone enjoys in the new person being exactly the thing that keeps that person from noticing your jealous behavior or ratting you out?
If any of this feels like you, you know what to do: stop. Bullying is such a toxic influence in the workplace, and its negativity is likely to even follow you home. You want to help others succeed and thrive. Really, when they do, so will you and everyone else.