Why is it that?

I am attracted to this person online, but I am not attracted to him in person?
I've beem talking with this guy for quite a long time now. When I talk with him on the phone or when we videochat, I like him a lot. And I can stay talking with him for hours. Our conversations are smooth. I've only met him twice in person and in both cases our conversations seemed so dull and forced. Even his voice is attractive on the phone but not in person.
When I see his pictures, he seems attractive to me and he gives off a bit of mystery. But when I met him, he didn't seem so attractive to me. And he doesn't put any filters on his pictures.
He is the same person both online and in person.
I know he never pretended to be a different person from what he is. But in my eyes he's like two different people. I feel many romantic emotions when we speak on the phone but I felt nothing when I met him. Actually, I felt a little disappointment in my heart when I first met him. It's not that I dislike him. What's wrong with me?
Why is it that?
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