Firstly I want to echo Riot, Hammy and Anika's posts.

You have no business questioning her sexual experience/inexperience unless you are bringing to the table exactly what you expect from her. No double standards.

Then I have concerns of my own...
I'm a tad (alot) confused!

Why do you look to date virgins if you're not even going to wait for marriage anyway? What is the point of this useless practice of yours?

Here's some advice:
Stop having sex with your gf or any future gf's regardless of previous experience. Instead vow to eachother to wait until you're married.

Thats how newly committed Christians do it anyway. They make a chastity vow to one another and seal it with promise rings. Because the past is irrelevant (save for venereal diseases) and the future is what matters.

Now if you have real feelings for this gf of yours, I suggest you get off your high horse and fix things before you fall off when she leaves you.