I hope you have put off marying this girl, maybe forever. You are staring at the #1 reason for divorce and you have not even been to the alter. I saw a list of the reasons for divorce and I believe that 3 of the top 5 were related to sex. #1 is an affair (which is directly or indirectly related to sex), #2 was lack of sex, and in the top five was also loss of looks (which again is related to sex).