I confuse on my girlfriend weather
She virgin or not. Can help me to find

You ask her. That's it.

There is no definite medical or physical test which will establish if she's a virgin or not. There is a myth that you can tell by the state of a girl's hymen. No, you can't. Some virgins have no significant hymen at all, but they are still virgins.

And to be blunt, it's not really your business. What she did before she met you is her business, not yours.