Raine, I agree w/all of the posters. Your h is a runner and right now he's got a huge load of guilt on his shoulders. The things he said are right out of the mlc script. I know that the discussion disturbed you and w/a new born in the home and him being a "disney" dad doesn't help. However, I do agree w/T^2, in time things should settle down and he may very well decide differently. For now, continue to be consistent in what you say and do, i.e., validating, being forgiving, calm and the biggest key of all patience.
Raine, don't change a thing...you are doing everything right. Continue to be the wonderful person you have always been, i.e., mother, wife, companion, and friend. When your h sees that you are not "hounding" him about things, he very well may begin to see things in a clearer way, especially when he holds that precious little boy.
Hang in there.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.