this is not a risk for you. the herpes virus doesn't lay on your gf's lips to be transmitted to other body parts for you.
also indeed, having hsv1 orally does give you significant protection against contracting it genitally. it's not 100% but it's up there.
has your gf ever been tested to know her own status? If she isn't sure if she has hsv1 herself or not, you shouldn't be kissing her when you have a cold sore!!
grace
Isee anybody else shed some light?
I fear the same thing!!! I went down on my bf then had vaginal sex... Well I found out on pos for hsv-1 by blood test... I fear that I may have given it to myself this way.... The good news is I have heard that it is very rare if not impossible... They say the way it is possible is if someone else gives it to you... I'm guessing it has something to do about your antibodies... It is thought that the IGM antibodies appear when you have a current outbreak which gives a good coverage.