You hold your cards or you open yourself up to limbo and months of pain. Don't give him the opportunity to sit on the fence. It will come at your expense, it will be horrible and it will delay what you need to do for yourself.
I'm so sorry you're going through this. It's terrifying, confusing and incredibly disorienting. Just know that it does get better. I'm 9 months out and I'm not all the way better but it doesn't consume every thought anymore.
Just remember that no matter how much YOU want to reconcile, no matter how much YOU want to save the marriage, you can't do it without him. It requires two people.