I think you're rather selfish.
You have a sensible girl who is not giving in to your pushing for sex.
She deserves better.
When the time is right and she feels ready she will give whatever she pleases and until such time her body is her temple and she has every right to refuse whatever she wishes.
I so wish more girls had her brains.
Girls take a leaf from her book - if you don't wanna do it then don't - it's your right to say no.
His balls will not go blue/explode/or fall off or any other rubbish he may try to tell you.