I only keep my really close friends by my side. I don't have time to friendly acquatainces or should I say emotional energy. The friends that I have understand and I don't really say to much to the one that doesn't have any children. She has been sympathetic for years but I think I've worn her out! I keep it simple.
My other dear friend has children and 2 have had difficulties and she understands to well. It's like we are in our own private club that we can share our secrets.
I figure if they are true friends they will stick by you. If not, oh well. Of course, I have to do my part to nurture the friendship.