I have felt the same way about missing co-workers. What I did was hire an assistant for a couple of hours a day. Her and I don't gab. She really does attend to the children with me, but just having her there makes all the difference for me. For my sanity, the cost to pay her is worth it. Then if you need her to tag team with you for the one not sleeping...it's an option. (that doesn't work if it keeps other children up though )