Maybe he knows deep down that he's the bad guy in this deal but wants you to get pissed enough that you file on him. That way you get to be the bad guy in his mind. To be honest, none of us can truly know what our spouse is thinking. You just have to do what you are willing to do. Like the others say, if you lay down an ultimatum, you have to be 100% prepared to stand by it. If you back off of it, you lose all credibility (remember the old story of the boy who cried wolf?)
You are right, it is a beautiful day here, I had to drive into West LA today. If I don't get on the road back to the I.E. by 3:00, I'll never make my 5:45 appointment with the MFT. QT, go eat lunch outside today, enjoy the weather and think about how good a person YOU are.