Why does this woman always walks by me and always saids hello and now hi to me?

She always said hello to me when walking by me, but today she said " hi " to me

Can someone give a rundown when a woman said, "Hey, Hello or Hi to a guy

I just want to make sure im not overthinking it! 😐
Why does this woman always walks by me and always saids hello and now hi to me?
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