Awwww, I know what you mean...it really IS sad
It just comes and goes sooo quickly - way faster than it used to when I was a kid. As you get older, time just flys by in the blink of an eye.
I hate it. Of course all the decorations are up etc., but I do get sad looking under the tree and all the presents are gone....it just looks so empty now
I get like this every year though.
We have a Christian radio station here that plays Christmas music 24/7 starting Thanksgiving and ending after New Years....and I am going to be even MORE depressed when that goes off
Ugh.