A., I am living a similar nightmare now, minus the girlfriend. The difference is, we are still in the same household and have not split up completely yet. It is coming. If you are dealing with an alcohol situation, count your blessings that he doesn't want the kids more often! That may sound harsh, dear, but look at what they are subject to around all that alcohol behavior!! Kids are harmed by it. Being the wife of an alcoholic, I can tell you, they brainwash you into thinking that the alcohol behavior and anger is normal and okay. It ISN"T!!!! It takes getting away from it for awhile to see it more clear! Get yourself to Al-Anon meetings right away. These support groups will give you a place to dump your pain, in healthy, safe ways and how to deal with your crisis! Al-Anon was far more beneficial to me than expensive counselling.
I can half imagine how unsafe your kids are around him (not by any purposeful harm to them, but neglect; because he is more obsessed with his alcohol and girlfriend than the children)When your kids are with you, you know they are safe and happy. Your husband sounds like a twin to mine! I wish he HAD a girlfriend so he would have more motivation to be a ghost in our lives!! My husband has gone thru rehab because I absolutely would not allow him or alcohol in the home anymore after seeing the progression of the anger/alcohol behavior. He is a completely different person, so much better, and finally acting more like a father to them than ever. But he is not working his steps and is not agreeing to counselling which was a condition to let him live here, so our days are probably numbered. But I will tell you, I chose to suffer and stay with him, and work on reconciliation because I was told that the courts don't guarantee the safety of children when one parent is an alcoholic. All they care about is seeing that both parents have equal visitation. This terrified me into staying with my husband. To me, my kids safety is paramount. What you need to do is follow the advice of some of the wonderful mothers below; completely detach from worrying about the girlfriend. Heck, she may be their protection and safety someday if he gets drunk and goes off!
Let your kids see him for who he is. Yes, it will hurt them to see his true colors and bad choices, but why hide it from them? They will find out later anyway. If I were you, I would focus more on his alcohol behavior and making sure he is not verbally or physically abusing them with an anger problem. There are a few things you can do, to fight in court to protect them. Such as supervised visitation. It is expensive (to him, not you) and there are no guarantees, but that is one area where you MUST protect them with all your might!
My heart breaks with you. Focus on yourself right now. Take care of you, because you are the only sane thing your kids have right now. You are a good mommy and they need you to be healthy, happy and emotionally intact. I will pray for you very much, dear sister! Hang in there!!