This person was attracted but then saw me as a friend, why is this?

I'm on a date site, I recently met someone who was nice a few months ago. We had talked previously but he went off the site and came back on to say hello to me again. I moved and he said he was glad I lived closer to him. We hit it off and I was going to meet him at a park but changed my mind and wanted to wait a little. I wanted to meet recently because we had been talking for a while. He admitted that we share a connection. When I asked him to meet, he said only as friends. When I asked him why, he asked me what made you think that I had any romantic feelings?

He said he never alluded to any intentions of dating me in his conversations. He said that I never asked him how he felt about me. He said he was attracted to me back when I asked him to meet at the park but when he saw I wasn't ready he said he saw me as a friend. He never mentioned any sexual and racy things to me unlike other guys on the site but I thought he was just being respectable. I'm confused, it's a date site. What would this guy want? What would make him have such a change of heart?