I’m sorry but I just don’t understand where you are at. I feel you are adopting this “I’m a very private person” label as an armor to close yourself off from a closer relationship with your family. I’m very much an introvert with my own internal world, and yet I feel people are probably the point of life. Relationships are not always comfortable, but I feel that discomfort is part of the fun-- to approach it with curiosity to see what happens and as a growth opportunity to see how you’ll practice communicating with the other person with openness and vulnerability. To me that’s way more fun and interesting than shutting down yourself and others with a priori rules.