I can miss my kids like heck when they aren't with me, too. I know what you mean. When I really get to thinking about them like that I just pick everything and myself apart. I try to not let it get to me, but eventually that denial builds up and I have to let it out. It helps to have a distraction for moods like this. For me, it's work. Unfortunetly, I can't work 24/7 so I have to find other things. What distracts you from your moods?