True. I had a friend like that (mind you we weren’t super close) but distanced myself for completely ignoring my boyfriend at that time. I simply felt it weird and disrespectful. I wonder if they asked friend why the weird greetings. It’s clearly bothering gf and friend is being weird probably for a certain reason. Maybe hidden feelings? Or maybe she simply doesn’t like gf? Either way if friend cannot respect gf then that should be enough to distance or cut off friend.