I need a guys opinion on this touchy subject?

if i tell my gf im a virgin her opinion of me will be tainted. she will not think of me the same way. she can have any guy she wants, and im sure she doesn't want to deal with the awkwardness of having to be my first. what should i do? she thinks and is attracted to me cuz she thinks i have experience and that im the alpha male. if she finds out im a virgin she'll walk for sure. she WILL think less of me. advice? at my age being a virgin is a turnoff!!!