Ohhhh yeahhhh. A BIL of mine was telling me that when he gets in arguments with his gf, they kind of ignore it until they can be normal together...and my fiance told him you gotta communicate.

And honestly they just never seemed solid. Part of it was how performative the gf social media appeared. So "happy" and "perfect". I understand some are genuine, but like you and me, we can see past it.

I'm not saying I'm always right, but when they did break up, I wasn't surprised.

This happened with another BIL and it was very similar. Even from 100s of miles away you can see the fakeness!

Nothing to be done. Just let it happen. Live your own life.

Everyone has to make their own mistakes to learn from them.