<human>: Give me the gist of the text in a nutshell

I have a few people in my life (I prefer not to call them "friends", because I don't see them as such). These three people are very close, almost as if they are family. This is fine, everyone has their best friends. However, these people (2 girls, 1 guy) seem to go out of their way to make sure they exclude everyone else from their lives. It is the three of them first, everyone else second. About a year ago, I brought this up to one of the three people (a person who i have known for 15 years, someone I believed i could trust). I said that I felt neglected as a friend because on the surface their gestures would seem nice and cordial, but once you are around them they made no effort to include me or anyone else they were with at whatever social gathering there was. I was immediately shunned from their little group after I spoke my mind because I apparently offended them. Anyway, a few weeks later, I would apologize and we sort of make up, I swallow my pride and admit I may have overreacted. Still, I am wary of being with them because of the way that they exclude people and act like children. About a year later (present day), other friends of mine--friends who have always had my back and been there for me (who were also well acquainted with the three) have a very similar issue. They had a fight over practically nothing. The three friends who act immature now have practically nobody except themselves. This puts me in an awkward position. I don't particularly like these three people, but they did not do anything to wrong me and will still occasionally invite me out (as if nothing happened) to social gatherings and such. I don't know what is the right way to feel about this, considering that they have wronged me in the past and that they now have behaved in a similarly immature way towards close friends of mine. This isn't really an urgent issue, just wondering if anyone else has input or a similar issue in their social lives.
<bot>: Karma is biting some cliquish people I know in the ass, and I don't know how to feel about it