If your friend is depressed then what she needs is the very last thing she wants: a change, some exercise, something to challenge the mood. Moods feel so sure of themselves.
To me, unschooled, depression is being stuck in something unresolvable. A double-bind: your're damned if you know the truth and damned if you don't. You're sentenced to think the worst of yourself, because you won't risk the look. You won't risk the potential self-exposure, which decision is absurd on its face the instant you consider it.
Whatever the conflict(s) is, it needs to be resolved before she can release herself. She believes in her double-bind. She must find a crack in her certainty, a bit of healing
cognitive-dissonance. Some of her certainties are wrong, but it feels traumatizing to come to the realization.
Much like what we in this rag-tag movement have been experiencing. After we've grown accustomed to doing the wrong thing, it begins to feel right, and the correction feels wrong, too wrong, and this is not even considering all the deliberate deception any seeker must wade through.
We take the blue pill to end the discomfort, accept the depression as the price in pain for what we know to be the crime of self-deception and self-denyal.