Like, actually, the same thing (or similar) happened to me.

I sit in classroom, other girl walks in, I say hi (from 5 feet away). Nothing else.

She turns away in disgust and seems to be angry for some reason.

Ok, I decide, let her cool down a bit.

Talk to her an hour later. To do so, I approach her to 3 feet or sth. Anyways, she looks at me in disgust and is about to turn to her friend, complaining. I say “what’s wrong?”. She replies with “nothing”, cynical.

So sad. Like, what’s going on.