Yep I had little ones to when my exH and I first separated (1 and 3) but we separated on a very friendly basis. We still have that same friendliness now and it works for the kids. If one of us has imposed a grounding for bad behaviour then the other one carries it on at their place. Yes your heart breaks when they leave but you know they are going to a place where they will get all the same love and attention you give them. Take those days when they are not there to do something for yourself. That way you will still miss them but also will be busy. I volunteered at an op shop when they got older and went to preschool. That way I had adult conversation and felt like I was contributing something to the community.