CP, I too am a 2nd time arounder with young kids. I feel your pain. I also understand all too well how it feels to be more at ease when H isn't home. Mine is still living with us as this 2nd time has only gone on for a month so far. I hope you can get things figured out and settled for your own peace of mind. I too have been wondering about AD but I am scared to pull the trigger.
Best of luck.
Me: 33 / H: 36 M: 10y / T: 14y 3 kids BD: 2/22/14 Live in separation 3/8/14 H consult lawyer, says filing asap 4/24/14 H moved out 4/25/14 2nd time around. 1st separation 4y ago lasted a month