Use Body Language
As humans, we’re professionals at reading body language because we’ve been doing it our entire lives. If someone you’re talking to is standing a little too close, try pivoting away and leaning back to cue to the other person that you need some distance.
Additionally, if you’re walking past someone and swerve to the side to create distance, odds are the other person will take notice. To avoid being misconstrued as rude, you can offer a smile or a hand wave.