I'm worried about telling my partner that I might have bipolar disorder.

A few days ago, my partner told one of their coworkers about me making cookies at night, and the coworker immediately asked if I was manic. I decided to look into it and while I don't get highly manic or depressed, my behavior does match the symptoms pretty well. On top of that, about half of people with MS have a mood disorder.

I guess I don't want my partner to think of me as a normal person with a layer of personality on top due to BPD. And I really don't want them to be scared of my hurting them due to stereotypes about it. But there is a really good chance I have it (I will seek a diagnosis) and they have a right to know.