Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: some background, im a newish (9 months now yikes) developer at a large company, a couple weeks after i started the company had a new hire picnic sort of event, and I went met some people they seemed chill. One member I met invited to a get together over the weekend, and it was pretty much a board game night, we all brought some brews and played board games. It was all pretty chill, I don't think I made any weird faux pas or offended anyone, but we talked about doing like a korean bbq dinner sort of thing at some point, which i was cool with. As it turns out they went and made a private group channel on slack (communication/collab app with reactions) but I was never invited to that group. When I ran into the member who invited me initially I asked about the korean BBQ, and he said they already went and said we made an event in the slack channel (the one im not a member of), and I said oh im not a member, and he said oh well. 

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so yeah for some reason they never invited me back in the group, I didn't bother asking why, I don't handle rejection well (\[ADHD reasons \] RSD ([https://www.additudemag.com/slideshows/adhd-emotions-how-they-affect-your-life/](https://www.additudemag.com/slideshows/adhd-emotions-how-they-affect-your-life/)), so I moved on. 

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the problem is the members of this group are still part of my overarching org, im on a team within the org, and they're on another team within the org (i think 3 of them are actually on the same team so they sit in the same area etc), I've made my group of friends at this point so idrc. 

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Now my boss recently asked me to talk to one of the members about the stuff that she's been working on, because it's related to what I'm working on, and me (still hurt and confused about why i was rejected and excluded from the group in the first place) refused to, and am currently figuring out the implementation on my own. 

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and yeah im a male, i could "grow some balls" in regards to the situation but fuck them, its not the exclusion that makes me angry, it's the fact that i was never told why. 

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AITA for not wanting to work with any of them? Should i confront and ask why? Is it even worth it at this point ( i assume it is because professional stuff). 

not wanting to work (professionally) with people who've excluded me from their group