Which Is The Test To Prove Virginity?

i am 17yrs old and i had sex with my boyfriend many times.but now my boyfriend has left me.the new guy in my life is a virgin and believes i to am a virgin on my saying so but demands a test in future...is there any test which proves virginity..if yes then which..and how can i get out of this situation with this new guy who loves me but wants me to prove my virginity..i dont want him to know i am not a virgin
please help