Busting, this is a huge decision, and I agree with what everyone else has said. My H also started talking about us moving to CA within a year for him to be happy. He just wanted to run away from OW, and I felt scared. What if things didn't work out (he said he could not commit to our M) and I was left alone 3,000 miles away from CT? So I waited and waited to decide and that's when he said he's the one who wanted out. I don't know if this helps, but at least you can see it's a common thing in men with MLC. They want to run away from their internal struggles.
At the end, it's your call, but I like the way you phrased your own response. Good idea to think about his reaction and be prepared with another response. You must be strong. I'm keeping you in my thoughts and prayers.