Just be confident and be yourself..maybe a couple of light brushes of make up with get you the proper heads start..Compliment him at first,the looks the stuff,make him feel that he needs you..laugh at his jokes even if they aren't funny..and never make him feel that you're not interested in what he is talking about..:)

Just be yourself, if he really like you he will find your charm. Maybe you can dress up well, some dress style you like then you may feel confident!
Try dressondress.com see whether you can find some nice dresses there.
Good luck!

I think you should definitely show your calm and confident side...don't think of this date as an extremely important event...have fun while convincing him that it would be nice to ask you out for a second date.....you can do that using the following tricks...

http://www.love-relationships.becomegorgeous.com/flirting_and_dating/6_ways_to_make_your_friend_fall_in_love_with_you-5708.html

http://www.love-relationships.becomegorgeous.com/flirting_and_dating/tricks_to_make_him_fall_in_love_with_you-5658.html

first of all don't take him or yourself that seriously..and be yourself..don't try to impress him to hard.and maybe you might wanna show himyou are interested and give him a chance to ask you ou first.he may or may not see you in that way but if he does he should ask you out.if he is shy or doesn't feel sure your diggin him then he might be scared to ask you out.tell him you think he looks cute today or something n then suggest meeting up to do a non-date thing like maybe you need help with a paper or something then you could flirt just a lil bit n if he likes you he will def ask you out!!!that way you don't haveta worry about him saying no.it actually takes the pressure off you n it goes on him hehe!