No this a new behavior, in the sense that I have always battled with depression. When the kids are around I try and act like all is good. But when alone I am a mess. To answer your question they havent noticed. My kids are of the age and open enough to say something if they notice it. However it is summer break and they have been out playing alot with there friends.
I was feeling pretty sorry for myself (with it being my birthday and W being out of town) when I got home. So, I took the kids out for a meal. Kind of cheered me up a bit. It was nice