How to decide if a girl is virginor not,,, for marriage?

Ask her husband! A person will always be wedded to a girl or vice versa who is of the same or similar disposition as the other ie. if the husband has had fun-loving days during his time as bachelor, the girl or wife will be of the same or similar disposition. This is the formula that God Almighty prescribes for those intending to marry. So be sure, if you are pure, then your would be husband will also be pure.