Another girls trip

Today I went to a friend‘s birthday party, and I was talking about how I wanted to go to Six Flags waterpark. One of the girls there was constantly shitting on it and saying how there’s no point driving that far for it, and I was just kind of saying I enjoy it. I was asking A if she was interested, and she was saying that she was. The other girl started talking about how she wanted to go to a different one, and then said that it would be fun to go as a girls thing. It just directly feels like such a slap in the face to say that because it excludes me. It feels like intentionally trying to set up a situation or social dynamic where it is implied that I am not allowed. That shit hurts.