maybe i'm a little "old school" but what "people of school" have to do with your relationship or what you do or don't do with your girlfriend? (maybe you already told in another topic but after you going out with a girl for a week, she's already your girlfriend? )
If you both do sex or not it's up with you not with the school yard..... maybe i'm just gettin old....

Anyway, i think your relationship needs a little bit time after all, a week it's nothing... please note that i'm assuming that you really like your girlfriend and it's not a casual f*ck...