Most Helpful Guy
This is why I've never dated anyone from work.
Based on what you've written, I don't think you did anything wrong. That's what dates are for -- to help you get to know a person. He got to spend some time with you, and he wasn't feeling it. It happens to the best of us; it doesn't mean you did anything wrong. The best thing you can do at this point is just keep things professional at work and leave him alone unless you have to interact with him as part of your job. Eventually your emotional wounds will heal and you'll both move on.