"I have been saving my virginity for her all this time. I really want her to be my first and last."
 has been she saving her virginity for you all this time. Are you hers  first and probably the last?
10 years... it's a long time.
Never trust women.
They have a higher desire and desperation for  physical education than men.

Having said that, get tested for STD before you get married.

Don't know for some reasons, i feel writing this. 

I wish i be wrong in this case..
Good luck and Enjoy.