Day Forty Three-Need To Know Basis

So....I am under the impression that there is just NEVER a good time to divulge certain types of information.  You can wait and wait....and wait for that ideal moment, but some statements, for instance:  "I think we should see other people." or "I slept with your best friend." or "I have this little, pus-oozing sore..." will never be taken well regardless of timing. So when should you reveal certain (less traumatizing) truths?
I am wondering because, as I've mentioned, I am bipolar.  Does it show, you ask?  Not generally (but of course, that is my opinion), however there are times...like the past few weeks for instance...when I may feel the need to lay low...like REALLY low...because I simply lack the energy to do much more than the basics required to get by.  If I make plans with you, odds are quite good that I will also cancel these plans...but odds are even better that I just won't make them in the first place.  I may seem distant...distracted...sometimes not so much...sometimes much, much more......hard to say really (and yes, I am intentionally being rather vague).
Since I have never really discussed my disorder with anyone in my life until recently, I am at a bit of a loss.  Do I owe people who might potentially get involved with me a warning?  Or is this equivalent to say.....wearing a hairpiece or a padded bra?  Is it on a similar scale of deception?  I've gotten involved with someone who changed their behavior quite a bit over the course of months...but I suppose that's the "normal" dating protocol?  Would you feel deceived if someone you were dating hid things from you?  But then, when should it matter to know?
Or does it all come down to the Marilyn Monroe quote:  "I'm selfish, impatient, and a little insecure.  I make mistakes, I am out of control and at times hard to handle.  But if you can't handle me at my worst, then you sure as hell don't deserve me at my best."
In the dating world we all get to know one another on our best behavior, so in a way, we all have our fingers crossed behind our backs.  Is that what eventually determines love?  The day the mask cracks and you realize that this is still the most wonderful person in the world?