Now you're getting my point, and I'm sure in a few days you will feel even luckier that this happened now than if you had been on 10 dates or dated for a few months and it then happened. The harsh reality of the single scene is that it is a jungle. All you can do is look back and see if anything you did was not acceptable to the way you wanted to portray yourself. Trying to figure out why he did that is an exercise in futility as you'll never know and even if you did find out it still probably wouldn't make sense. Concentrate on the next potential date. Just my opinion from someone who's been there.