Am I wrong to feel hurt, and is my friend also at fault for excluding me?

So there was this girl who was not very nice. We had gone for a group hangout.

In the end when I was paying for my bill the other two were talking. The not nice one brought up some topic of some plans, not sure if it was some tennis meetup or something else. But definitely she brought it up and was talking to the second girl in hushed tones it felt exclusionary.

Then when I was done she was saying something about (a nature landmark kind of spot etc.) - (something you have to drive 3 hours away). She continued saying maybe second week of June etc. all in hushed tones.

The second girl said there's (another nature landmark spot etc. too). The second girl I think sensing a bit of my discomfort did say then, "We can post on the group too to see if anyone else is interested in joining." She added to the first girl, "I'll let you know about it."

On our way out the first girl then gave me a fake bye see you ladies etc. I was like 2 mins ago she was insulting me by bringing up a plan I was not really being invited to right in front of me and now acting all fake nice.

However I wondered - maybe the girl I thought was a casual friend (the second girl) isn't one. Why didn't she turn to me and ask if I wanted to join etc. So I am really hurt. It's possible the reason she didn't shut the first girl down is she wanted to keep the peace but like I don' t get why she didn't turn around to me and said there's this trip would you like to come etc.

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Am I wrong to feel hurt, and is my friend also at fault for excluding me?
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