If after you have intercourse there is substantial bleeding, that is a good sign. But, there is always a chance that the hymen, or the skin covering, is already broken by some other means, then you...
A "virgin" is a person who has never has sexual intercourse with another. Answer the question and well, there's your answer. Also, this just might be me but there's all too much emphasis placed on if...
You can tell by looking yourself in the mirror and noticing that you don't have an aura around your head and do not have any resemblance to the Virgin Mary.