Growing up means :propelling yourself forward into whatever lies ahead, one turn of the wheel at a time.
It's funny how two people can grow up in the same town, go to the same school, have the same friends, and end up so totally different. Family, or lack of it, counts for more than you'd think.
Maybe it was just part of growing up with someone. Once you have a rhythm and stay with it long enough, it's not hard to find again.