Although probably not meet someone and then not not worried or not think, but just a different situation and burden the lives of the people changed over time.
I could not find someone who already does not care or did not think of it as a situation of life and the burden of the people that are changing over time.
Even may not meet someone and not worry or don"t think just means you depending on the situation and the burden of the life of each person is different with the change of time.