It is very nice that your girlfriend is so supportive. I have been with both uncircumcised and circumsised men here in the US. White males are always circumcised, but there are still black men that are not, especially from other countries. Perhaps you are a larger size than most men and that is part of the reason that your sensitivity has been increased. Not to be rude, but larger men, over 6 inches usually but not always are far more sensitive than average men and small men. Hopefully everything will work out.