What's going on: I got nothing when many applicants got rejection from the same grad program
The only people who know are involved with the admissions process. Maybe they have accepted you, but just have sent the acceptances out or maybe they rejected you and you rejection is in a later batch. They also could have never received or lost your application. You just cannot know. In a situation like this, where you think something is up because other people have heard, it would be inappropriate to ask the admissions team what is happening. If you think they lost your application, and if they sent you an aknonowledgement it is very unlikely, then it might be reasonable to ask. Then again, it is pretty late to check and they are probably not interested in getting a late application.

In simple terms, not having been rejected yet is much better news than having been rejected. Not having been rejected when others have, is not particularly predictive.