Please remember that your children are little. I was chastised for telling my kids that Daddy drinks too much beer. They were asking questions and I tried to be honest, but the counselor said "nope. they don't need to know that at this age."
I like what the others have said: that grown-ups make decisions that kids don't understand and you both love them. that you have decided to live apart.
and I agree with Thumper on bringing the joy back into the house. make sure they know that they have a good life, even when it doesn't feel that way.
I don't want my kids to feel disadvantaged. I think that will hurt them in the long run, so I try to protect them from the ugly things, but mine are young - 9, 8 and 3. The older two know a little more, but not nearly everything. they don't really undersatnd, but they don't need to understand, their main need is to feel secure.
