Some people think humans are more honest when they are drunk. Which isn't true since alcohol is a depressant and slows down most brain functions to zilch. Which means we can say something that is a lie just for the sake of speaking because that's the only thing your mind honed in on.

I'd say to be honest. He knows you were drinking, so I don't think it is out of the question to say "I was drinking and I said something I didn't mean." and go from there. I think it's important to stay calm in these kind of situations because you both will feed off of each others anxiety and it will just grow.

Take care.