I'm so sorry TnDep. Still loving her isn't something you can turn off like a faucet, but she's not even on the fence.
My advice is easier said than done but do it as much as you possibly can.
Have no contact with her whatsoever. Try to drop the kids at her folks house or something. Don't drive by her work or house or anything. Never call her. Just refuse to have anything to do with her. Don't help her when she needs her car fixed etc, just don't do anything but for yourself and your kids.
Continue with counseling. Get with your medical doctor and do some anti depression therapy, sleeping pills, whatever you need.
Make an effort to improve or maintain your physical health, exercise more etc, that will help a lot.
When you start getting inside your head about her, just THINK OF SOMETHING ELSE.
I know, easier said than done but it gets easier with practice.
You are a wise man, already getting the help you need. That will give you an advantage over everyone who tries to do it on their own, and you will get better sooner.
Hang in there Bud, better days are ahead.