ok I've got abit of a problem here I'm just at a stage with my gf when were ready for sex but.... reading all of these has got be nervous our size difference is quite big i'm 6'2/3 and shes a little over 5'2 (i think). Apart from that I'm over 9 inches long am i going to hurt her?

we've done other stuff And Iam guessing the answer could be yes, any advice.