Hey Spade! Good to have ya. You sound exactly like me during my Junior year of High School and your post sounds exactly like my first real date with a very attractive girl.
First off, stop calling yourself a loser! If you believe you're a loser, the girl you're out with will see that and be turned off. If I'm right in thinking that you're like me before my first gf, then you should find some material to build confidence and self esteem. Also sarging WILL raise your confidence even if it is a newbie mission like saying "Hi" with a big smile to every girl you pass at the mall one day
Second, in my experience, action dates are the way to go. I'm not sure what you did with her on this date, but mini golf, ice skating, bowling, Billiards(Pool), and so on have all been winners for me. Some of them can get you some great kino in themselves because you might have to "help" her figure out how to hold the pool cue, or the golf club, help her up if she falls while skating and vice versa. (cheesy, but it works!)
Action dates also keep the date fun and interesting, and sometimes even a bit competitive
which keeps you from feeling like you need to keep conversation flowing constantly. I hope this helps!~Muse