Sixteen Years

I know this is so cliche...but what happened? How did Erik go from the above pic (5 months) to the one below...Six years...to...

...to now, sixteen years...so fast, so bittersweet...but he never lost the joyfulness he had as a baby (he used to wake up, singing and talking to himself and his stuffed toys in his crib...now, on school break, he just doesn't wake up!). In a few years, he'll be gone and I'll be...???