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: This happened a long time ago in college, but I've been thinking about it lately.

I changed high schools junior year and met a friend senior year (let's call her Ann) that ended up going to the same college as me. Before that, I had gone to a small K-12 (we'll call it Nerd Academy) where most of us had been there since the beginning, so we were really close. Quite a few of my friends from that school ended up going to the same college as well.

I spent most of my time with Ann, but I would still get together with my friends from Nerd Academy, especially on the weekends. This seemed to piss Ann off that I didn't invite her to hang out with us. She had met some of them in passing, but nothing more. Nerd Academy get togethers overwhelmingly involved a lot of inside jokes from our time at that school, and I don't think Ann would have enjoyed being a part of them and I honestly didn't want to be spending time during them explaining everything to her so that she would understand what we were talking about.

Ann didn't have a friend group that I didn't also know, so there wasn't really a similar situation on her side to compare to. Our friendship mutually ended after about a year for a lot of other reasons, but the fact that I was hanging out with other people without her was one of her main grievances. 

I understand that I could have made a greater effort to include her and let her decide for herself if she felt comfortable with that friend group, but some other incidents generally made me feel like she was just jealous and controlling. One such event was a Saturday morning where I told her I would go to this class at the community center with her so she wouldn't be alone but changed my mind maybe 3 minutes later because I realized I had an assignment due. She went anyway and I invited a mutual friend of ours over to my place to study. The friend posted something on Snapchat that indicated she had been over at my place, and Ann saw it and flipped a shit at me for "bailing on her to hang out with someone else" even though I explained to her that we were just studying together and had hardly spent 15 minutes of 4 hours goofing off.

So, what do you think? Was I being insensitive and excluding her? I've never taken issue with friends of mine hanging out with friend groups that I don't know and not inviting me but I don't want this to happen to another friendship if it turns out most people feel differently.

not inviting a friend when I hung out with another friend group