My take: going dark on him now, is the worst thing you can do. "Going dark", tends to make people think about the last things you did and said to them.

He's ready to file now, and walk away from you. Because of what YOU said to him.
The last things you said to him that are freshest in his mind , were basically, "I wont change; you should file for divorce now".

That's not "just going to go away", if you stick your head in the sand, "go dark", and hope he forgets about it.

He is not going to forget about it. You're going to have to put in a lot of effort to overcome that, if you want to. Possibly more effort than you have ever shown to him before.

My current status: june 2006. Wife ran out and filed D.
Finalized Jan 11, 2010, after 12.5 years M.
3 wonderful sons caught in the middle