Post Book Sadness??

So, this is something new to me. I just finished reading Yoko Ogawa's "Mina's Matchbox" and the way that she describes the relationship of Tomoko and Mina and the year they spent together, made me sad and reminded me of the innocence and wonder that I used to feel as a child and the carefree life I lived. It makes me want to go back to the time when all I cared about was books and volleyball and what new things I could learn. Anyone else experience this?