Relationships are built on relating. If you're not relating your authentic personal truth of who you are, the relationship is limited, and you are restricted.
Now, this doesn't mean you're obligated to share in all relationships. We do want to exercise discretion, because not all relationships are predicated on sharing this truth... but it depends on the truth. Some truths don't need to be known by strangers, or friends, or family members. And some truths must be known by lovers, if that relationship is to survive.
If it's your truth that you are female, well, that's why I transitioned, so I could be myself with everybody.