Woman reports coworker to HR after she snooped and found out about her wedding which she was keeping a secret: 'My coworkers say I escalated too far'

How much personal information you disclose to your coworkers is always a question. There are no hard-and-fast rules in the guidebook. Maybe you're the type of person who is besties with the people you work with. You will tell them anything, and you're always hanging out outside of work. Or maybe you're the type of person who loves to be friendly but keeps your boundaries strong. Or maybe you're the type of person who only doles out information on a need-to-know basis, and it turns out that your coworkers don't need to know much about you… at all. 

Whatever type of person you are, all that's important is that you're comfortable. Nobody is making you be friends with your coworkers, though sometimes it helps. But you are by no means obligated to share all the intimate details. And if you're the one getting boundary-zoned, it's on you to respect it.