Give him a chance.

[Hi. I was just going to let it go. No big. But if you want to get together again with a good plan for a date, I'll come down. I'm here for some friends' housewarming, so I won't be going out dancing, though. Talk later.]

You reply in a positive but noncommittal way. The ball is in his court. It would be nice to get a pay-off for surviving through the worst date ever. He didn't get less physically attractive in the last week.