It's a miracle we ever met.
In the whole universe, we just bumped into each other?
What is the odd of that?
Well, of course we can be connected and related in many ways.
Your cousin marrying my cousin, etc.
But what makes us more relate than our blood or DNA is our hearts and feelings. The heart and feelings form true and strong bond between people and it makes them related.
Thats why sometimes you feel like some people are part of you.
Its because of your heart and feelings you have for those people.