Hey, Sandra. I am so sorry that you are going through this. But you will get through. You have just become a member of a very big, wonderful club. So much of what you said hit me and others right where old scars are.
When I read your comment about him coming to your place to visit the kids, well it got my Irish up.
You do know he is treating you badly when he demands access to the house, right?
I, too went through similar stuff. I agree with Brigid, that I think you have some legal backing to get him away from your physical space. He sounds like a really nasty man to me and this is truly emotionally abusive.
Some time soon, when you are healing inside, and you start to feel whole again, you will see that what he does is strategically planned to keep you in a subservient and fearful place. And maybe that's when you will start to feel better (after feeling even worse of course).
You deserve love, real love. Not the sham this guy has twisted your kind heart into accepting as love.
Give it to yourself first. You will get there, you really will. It will all be okay.
I was so distraught when the kids were with my ex (although not in my house!) that I was more than happy to date and subsequently marry someone for whom "no kids" was a great thing! Made the nights without the kids (with whom my ex had little to with previously!!) much easier.....temporarily. Then I really woke up. Needless to say I had attracted N number 2. Why? Well, I hadn't done any work to figure out why N number one was someone I married in the first place. His acting badly was not news....it had just hit the unbearable level with the cheating!! I suspect yours did not suddenly turn into Atilla the Hun...that perhaps he was not so great to you besides the cheating? (like that's not enough, huh?)
So work on loving yourself, healing yourself, getting okay with being alone. I wish I could save you some heartache.....but face it now or face it later...you'll have some rough patches to get through. I highly recommend you get through it without another man. (unless he is your awesome therapist).
Your kids will be fine....they only need one great parent, really. And you know that's you. So do they.
Bite your toungue off if you have to, but let them come to terms with "suddenly awesome" dad, if that's the case. Support thier love for him as much as he doesn't deserve it! I have been divorced for 10 years and much nastiness has ensued. I can tell you, though, that one piece of advice (which I did slip up on occassionally) has so much to do with the respect my children now have for me (and unfortunately the disrespect they have for dad and his wife). It was hard won.
You are the example they need of what love is. So love yourself first of all.
Sending love and light to you.
Mum