26-year-old leaves a hangout early because her friend didn’t tell her she was bringing another friend, and now she questions her reaction: ‘Later she went to chat with a table of pilots, and again I felt left out’ – FAIL Blog

I’ve had many introverted friends, and I, as an extrovert, with time, have gotten to understand what kind of things might upset them, but it was, most definitely, something I didn’t naturally know. For example, for me, bringing somebody to a hangout where I’m meeting another friend, especially if the hangout involves other people, like this one (that apparently had other groups of people that the extrovert friend knew), would be totally normal and even fun. When I go to a bar or to a party, even if I go with a friend, I’m going to go and talk to people on my own, and I expect my friend to be able to integrate by herself, whether she knows people beforehand or not, just like I’d do if I’m invited to some acquaintance’s birthday party or whatever. People are not obligated to include you in conversation; you have to find a way to include yourself. That can be easy with some groups, and hard with others, but it’s never a personal affront.