An alternative thought from argytunes:
Maybe your girlfriend has grown comfortable spending New Years Eve alone...or with her family. So your invitation to "ring in 2009" with a full-blown date bothered her a little?
6 weeks of courtship doesn't necessarily mean a lifetime of commitment. You've gotseveral holidays coming up (Valentines Day/her birthday/special events in her life, etc.) that you can celebrate. If shecontinues to turnyou down...then you might want to reconsider giving yourselves a little space until SHE'S READY!
argytunes