When I was a teen and undiagnosed with bipolar disorder, I had a weird reaction to people around me — I would pick up their moods and personalities and found myself mimicking them. I suppose it was a way for me to try on other personalities that I might someday integrate into my own, when I was stable enough to do so.

When I was a little older, I began journaling, which quickly turned into blogging. My journals were repetitive…