Let me start off by saying I am not anti you filing for D. I think when it comes down to it though it is all about your anxiety and you think filing for D will relive it. I promise you it will not. If you want to put your kids first then do it. Trust me right now if you guys are not fighting then they will have no idea you are in a dysfunctional relationship.
You have the opportunity to man up and be the rock for your kids and not let the vampire bring you down.
I respect your decision either way. Try to have the conversation from a place of love and compassion and not hate or aggression.