There are some people I always cross paths with very consistently, or even near daily, for years. I will know them by their full name and know their personality pretty well just from observing them or overhearing them talk. But for some strange reason, we never once interacted. Not even a single word or a hint of a mutual acknowledgement. And I will never realize or notice this until after said person have announced they're leaving for good soon. And my initial reaction will be to say goodbye to this person before realizing I never once talked to this person, and dunno this person at all. Doing so, it will just be awkward. Not doing so, others will notice and they will see me as rude, thinking there is no way in heck we have never interacted once over all of these years.
This person and I walked by each other today as she's leaving probably for the last time. Everyone said their farewells and hugs to her. While I tried making eye contact with her wondering what should I do, and she glanced back at me. Just before I let out a polite slight smile and nod, she instantly glanced away comfortably and walked past me. Another odd thing is I did sign her farewell card, and she probably saw my name and wondered "who tf is dat?!" 😆
Even in school, I've had many people like this in my social circle as well. Friends of friends, I've always been around with for years, but never once have we acknowledged each other for some strange reason. Even times I will notice this, I will figure that must be a reason for it on their end, so I go out of my way to avoid interacting with them out of respect.