JM....hang in there. I can tell you from experience that your D will look to you and your W for support and observe how you are handling the situation. Stay strong, don't blame your W and always act happy around your kids to give them confidence and so they know that daddy is doing great!
To be honest how this has impacted my children still pisses me off and it is the 1 thing I still cry about. Initially I was not looking forward to being a part-time parent either but I now have to look at the positives. FOOTBALL season starts this Saturday and I can watch all day without someone nagging at me!!
I asked my IC about my kids and what to watch for. She told me my 8 yr old is old enough to express her feelings and I should observe but also know that I can ask her questions about how she feels about mommy and daddy not living together etc. she said my 6 yr was too young too question and to just observe her behavior, how she plays, school work, etc.
It [censored] either way you just have to make the most of and know it will pass.