Boy do I know what you mean!
This is exhaustion is exactly why I have stopped fighting my bipolar.
I just couldn't live with the steady stream of disappointment, exhaustion and hopelessness.
Since full frontal assault brought me nowhere, my new tactic is surfing...
I no longer view it as my enemy, its more of an appendage I never asked for, but can't remove. Kinda like what happens when 1 twin absorbs the other whilst in the womb, and is then born with left over parts from the twin who's no more...
Anyway, gawd I ramble.
Since I no longer fight it, I try to live with it in as much harmony as is humanly possible.
If I have the opportunity (privacy and time) I usually let the depression happen. I go with it so to speak. I cry, I curse and I yell. But most of all, I feel what my short circuiting brain is demanding I feel. Usually clears up the mood much faster (for me) than assaulting it.
Hypo I usually try and exaust it before it exhausts me...
Nowwww I'm not saying we should all just give in to our bipolar wants and go with every flow.
But what I am saying is, when its safe to do so, its ok to just be.