Family Life!

Some of us are blessed with a lot of people in our lives we consider family that are not really family. We also have family member's that we don't have in our lives that much that are true family. My question is,"why do we have people that are not family in our lives and actual family we don't really care to have in our lives"? I guess I don't understand why we would care for people we don't have to and not care for people we really should. All my life I have had aunts,uncles,cousins,and grandparents I know were not my family but I was lead to believe that these people were my family. I didn't know who was or  wasn't my true family. My point is I don't know if  I would want to know who is or is not my real family because I have grown up to love these people as if they were. One thing I do know and that is, there are people that are my family that I don't see much or ever really and at times I really wish they were around to spend time with and to share my life with. I have so many special people in my life that I want to introduce to all my family and my not get the chance too. Or should I look at it as if these people that are family don't make an effort to see me then I have already introduced my "family" that is important enough to make that effort to these people I consider important people and should not lose sleep over it? If there is someone in your life that you miss and want to share things with maybe you have to take the first steps in doing that or it will not happen.