Should I trust her and try to pursue a friendship after this?

So I met these girls. They seemed fine but I don't know my gut was off about one of them.

Then once, they randomly posted in a group (only had 3 of us in total including me) about some outside plan (see you tomorrow etc. etc.). I thought it was so rude - why are they posting about something I'm not invited to? It's disrespectful

Later i found out that this 'plan' was actually some general meetup kind of a thing that someone had organized. I found out through coincidence as someone else had posted about it. I think you had to mention if you were interested and that's how they coordinated it etc.

But I still thought it was so rude because I coincidentally found out I didn't know that, and also why didn't they ask me either way.

So this part is bothering me as now I'm not sure i trust her and I had already sensed my gut something off about one of them.

Updates
2 mo
It was like a mix of a general meetup/invite only kind of an event
Should I trust her and try to pursue a friendship after this?
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