If you vocalize your negativity, or even slightly frown when you say‘no,' more stress chemicals will be released, not only in your
brain, but in the listener's brain as well.
Although Myndi's regrets about how the break-up was carried out come from a very good-hearted place(a space that narcissists target at the outset),
it's unlikely that Vocalizing her feelings would have eased the end of the friendship.