It is an interesting and difficult and sad part of life when something happens to drive a wedge into a relationship.
The wedge could be driven by a controversial conversation, maybe the usage (abuse) of a substance, disagreement about friends or even dating an enemy, bad habits, who knows. There are a million things that can do it and eventually it usually leads to the demise of the relationship. But until then, it becomes a huge uncomfortable impediment to your relationship.
Making everyone in your life aware that you are Bipolar is like throwing a massive wedge in every relationship you have.