Lector~
I can remember having those "WHAT WAS I THINKING!?!?" moments, but this seems a little different. It seems that you had emailed him and had some sort of dating experience since you said he was the nicest guy you know....did you not find him at all attractive before this happened?
It seems that besides appearances, you really liked this guy. He said some things that really made you feel good. From experience, I can tell you that your first impressions don't always mean anything. I know that when I first met my hubby, I never thought he was my type. We ended up friends and, one night, he kissed me.....FIREWORKS! Funny thing is that even all these years later, he is still the hottest man in the world to me and I am never not turned on by the slightest touch, kiss or look. I don't even "see" any other men because no one can hold a candle to what I have with my hubby. I wouldn't be too quick to toss it away...give it some time!