JV I do personally feel it was mistake to bring up the relationship to your husband. I say that because i feel he is in a bad place right now. I also think he has not had enough time away from you to realize what he is missing. I guess by that I mean it doesn't feel like a separation much to him. He still calls you whenever he feels like. He sees you almost nearly everyday. He sees the kiddos a lot. He is not on any routine where he comes by say every friday and saturday he gets the kid's. He picks them up and drops them off and leaves. In stead he hangs around and plays on the computer or comes over whenever he wants. He seems to call very often.
I guess I am trying to say don't give up just yet. He may just be very lost still. BUT the way he has been treating you is terrible. You don't deserve to be treated like that or talked to the way he does.
For right now JV try real hard not to think about him. Be selfish and only think about you right now. But and this is just my opinion..I think you should distance yourself right now from him. Don't allow that contact between you. Simply don't answer the phone. Or tell him to let you know when he wants to stop by so you can be gone. Is it possible for you to take the kid's and go away for a week for a vacation before school starts. And when he has the kid's go out and enjoy yourself. Create some mystery for him to wonder about. You seems to getting a lot of interest from him when it appeared you were moving on and enjoying yourself.
And one more piece of advice don;t let him talk you into a quick divorce. Get yourself a lawyer if he keeps talking about it. Because you are entitled to 1/2 of everything you have.Including all that money he keeps from you in his own separate account. Mybe you ought to at least check into your rights and get this separation done legally. What if he just decided to be ugly and stop putting any money in your account. Or worse hides the money he has because he is anticipating a divorce.
JV do continue to post here. We would worry about you if you stopped. I would continue to post here in piecing. You may have hit a rough patch. But deep down you are still trying.