I'm an extremely private person. There are a lot of things I share with everyone openly, so there is this illusion that nothing is hidden, but there are a lot of thoughts and lives on the inside that only a handful of people see.
Most of this is because I don't really want to hear the opinions of most people who wouldn't agree with my own life choices. I chose alternative medicine to treat my cancer, but I never discussed this with my conventional doctors because they would just argue with me. Their image of the patient in their office, is very different than me as the patient at the Naturopath's office.
When I was first diagnosed, and separated from my husband, I had to lie to my doctors about where I lived, because I was living out of state, and was afraid the insurance wouldn't cover me.
And of course, during the trial for my divorce, I had to shut everything down. It was important that my ex-husband did not know who my friends were, because he might have used anything he knew about them against me. I have a handful of friends who own guns - he would have used that against me in court, even though it has nothing to do with me as a mother.
I am very private about relationships too. Most people don't know that I'm dating someone until it's been about 6 months...
That said - I do share everything in my life with my partner.