As you get older you realise that first red flag that you ignored will be the reason you break up 2 years later.
And you will regret not walking away that first time.
If I ever meet a guy with a girl best friend he treats like his emotional support platonic side girlfriend ever again, someone punch me directly in the jaw.
Literally never again
I just heard someone say, 'If they never heard your side of the story, then the side they did hear is just a reflection of how they already felt about you. It's confirmation bias.' That freed me from anyone who has villainised me without even speaking to me.