Why Does He Have to Grow Up?

So, I've been a ball of emotion lately with my son growing up.
I looked at some of his baby pictures yesterday, and cried.
Even though my son has long been out of his crib/toddler bed, it has been stashed in our extra room along with some ride-on toys that he still rides, but is essentially too big for now.
So up they went into the attic, but not before he kissed them goodbye.... *Sniff* I cried some more.
Here are some pics of my son over the past year and a half:

Ok, I think that is enough picture overload.
But look at how much he has changed. He doesn't have the chubby little baby face anymore.
Needless to say, this past summer alone he grew one size in clothing and 2 sizes in shoes.
My little man!