The context of the following conversation is Aubrey and Riley forged an alliance, but Aubrey had made other alliances with Riley's enemies and didn't intend to honor this alliance.:
Riley says Aubrey and I forged an alliance, but Aubrey made other alliances with my enemies and that's a problem.  Aubrey isn't loyal and didn't intend to honor our alliance..
The friend responds You mean Aubrey screwed you over?.
Riley responds To be honest, yes..
The friend responds That's horrible.  She's been your friend for years..
Riley responds I can't trust her anymore..
The friend responds People change..