Think about how in teen high school movies the guys with the hottest girls are the ones that are the most confident. If you look like you are scared they will read that in an instant. I wish I had had the confidence I do now when I was in high school.
The biggest trouble guys have is walking around with this "teleprompter" on their foreheads" That says "I'm desperate". Girls can read that from across the room, club, whatever. Why do you think married men get so much play and women hitting on them? It's because they are not looking for someone. Hence no "teleprompter". Confidence man confidence.
And take really good care of yourself. Chicks dig the well groomed healthy guys. Unless she is a goth or skater girl. Etc.