Whew... about not being around young children.
I understand about wanting him out of your life. I'm battling with the same thing. I just have to really buckle down and determine what is important and what to spend my energy on.
It just feels like it helps to not have any evidence of the past around. But even if he wasn't in your presence everyday, the addict always finds way to make themselves present. I have had to block my emails, etc. and he keeps finding ways. Now he's calling my job!
I hope you find resolve soon. I completely understand the nagging feeling.