how would you feel if a kind of pretty girl who has talked to you trough facebook, asked you out, you barely know her, and she told you she is interested and also shy? Would you think she is crazy? Also because we are both shy and dont see or talked in person, would you mind if i ask you out via facebook?
The guy is probably more busy being preoccupied with himself than he is with judging you. I would be wondering if she thinks I'm something that I'm not and worrying that she might bolt if she finds out I'm not what she was expecting. Guys can be self-conscious too. Guys aren't used to being asked out, especially shy ones and it can catch us off guard.
Whatever you're worried about, whether it's looking desperate or crazy or too bold, it's probably the furthest thing from his mind. He's probably wondering if he will be acceptable to you, not whether you are acceptable to him.
If she's spoken to me through Facebook and has met me in person at least twice. I would be: 1) extremely happy with myself 2) most certainly not creeped out. 3) impressed by her courage to defy gender roles put in place by society.