The end of elementary school

I'm really not sure how this has happened. How did he go from kindergarten to fifth grade? I'm full of emotions.  Excited that my boy is growing up and becoming more independent.  Sad that my boy is growing up and becoming more independent.  I miss not being number one in his life.  I know it's a good thing but it hurts my heart nonetheless. So now we have begun the beginning of the end of the elementary years.  Sigh.........