Oh, honey, I know how much you're hurting right now. I still really, really recommend counselling - you have kids together; no-one gets a free pass to walk away anymore. You knew he was cheating, and you chose to have children with him anyway; you both have to try every way possible to fix this now, for their sakes. They didn't ask for this.
I'm so glad you have somewhere to go where you have a support system - it just about killed me to think of you alone and struggling over the next few months! Don't rush into anything irreversible, though - I've heard it said that you should never make any major life decisions in the year after a birth or a death, because so much is in turmoil.
Could he just be scared about how having another baby is going to change your lives again? He sounds young and a bit immature; growing up is tough, especially if he feels alone or unsupported. Is he confortable reaching out to his family for support as well?
The other major thing is to protect yourself and your interests. Do you have joint bank accounts? Joint credit cards? Call the bank today, Monday morning if they're not open today, and see what you need to have a formal note on the accounts about the separation. You don't want to be responsible for any debt he might rack up while you're separated, especially if he is going through some kind of crisis and goes a bit nutty. Get him to put his obligations in writing, absolutely - maybe that'll make him see what divorce would really entail?
And remember, more than anything, that his relationship with you as a spouse has nothing to do with his relationship to the girls as their father. Some people are great at everything or awful at everything; some are great spouses and crummy parents, and some people are great parents and crummy spouses.
You still need to coparent with him for the rest of their lives. He will always be their dad. And it will never, ever be easy for them, no matter when you split. They will always want to know what
they did wrong to make daddy go away; kids are really good at thinking that everything in the world happens because of them, no matter how often they're told otherwise.
I'd also suggest checking out the forums at
Surviving Infidelity. The folks there have been through everything you can think of with cheating partners - some split, some reconciled, some are working on it - and they'll have really good advice for you on whatever you end up deciding to do. There's a bunch of good articles to read there, too.
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