Speed, our situations are very different. I'm older than you and have raised my kids. They are all adults and married now with children of their own.
Also I was married before. I was fortunate enough to get 2 MLCer's.
One was 38, the other 46.
I'm just at a point in my life where I don't want to get married again. I love my MLCer very much but it was him who wanted to get married, not me. So I'm fine being single.
You are in a different time in your life. You still have kids and you're relatively young. I would expect if your W doesn't come out of this you will marry again.
But I don't want to put the cart before the horse. You still want to reconcile your marriage and it may happen. Just keep hope in your heart but please protect yourself financially (which sounds like you did) and emotionally.
I would just let your W go for now. Concentrate on you and your kids. Make your life as happy as you can with out her in it.
I know how hard that is but it's all you can do right now.