i see, well maybe the art building will be a good idea then. to show confidence u need to just speak clearly, don't mumble, dont be overly loud (u will come off as wierd), talk slow as if u want her hanging on every word. also YOUR body language can show a lot of confidence. have an open body language, dont slouch.
5-signs-of-really-bad-body-language-and ... 22671.html
read that it should help. but dude i dont want u all nervous, stay calm, the worst thing that can happen is she will nicely say no and you have gained a friend out of it. if u dont allow things to be awkward that can really show a lot of alpha maleness, which she may later become attracted to. remember this, you cant miss what you never had. just act like this is practice for a big game! u are preparing for a world of new girls!