First, do we even know if they were following each other? I have no idea myself. Two, it seems kids unfollow for all kinds of reasons. They may have gotten in a little scrap. But that may not carry over much long term (or even intermediate).
My whole point was that Millennials micro-analyze (read over-analyze) every little social media cue. It's akin to analyzing someone's emotional state for every given day, and trying to draw long term conclusions based on that. And to top it off, teenagers emotional states are like pin ball machines.
I'm not a boomer fyi, in between Gen X and Gen Y.