It sure sounds suspicious, especially with his history.
I guess what I am thinking comes down to this... some might agree or disagree...
If you would still absolutely say "yes" if Dan said he wanted to try (as the pigs fly over....), then I think waiting to actually "date" is the way to go. But it's a personal choice, and I sure won't beat you up over it! Besides, with your new skills, you'd probably whoop me!