I think he would say those things (no one else has a problem with it, he is happy etc etc) to maintain his denial and protect his drinking.
If he makes you the problem then he gets to drink!
Hopefully he will learn (or not) one day that the drinking is the problem but don't hold your breath. You did the right thing, the best thing for you and your kids. It's a shame he didn't come to the party but it's his life. I think it's easy to make boundaries with the intention of hopefully catapulting someone into swift action, but the more I read on these boards and the more I watch my own situation unfold the more I learn that that doesn't always happen.
Just think of the way life feels without all the worry, anger and chaos of loving with him. That's how you know you've done the right thing.