Have you told your parents that you lied and that there is nothing wrong with the girl. I think your parents should be angry with you that you lied than with the girl.

Bismillah,

This story needs more details for fully beneficial advice to be given.  Are you financially independent from your parents?  If so, stand up, be a man, a Muslim man, marry the girl announcing your intentions to your parents and giving them the opportunity to participate in the wedding.

Do not cave in to any pressures regarding her, because as her husband, you need to protect her from your family until they also accept her.  They usually do after time.  I've seen some really stubborn families.  See this depends on if you are the oldest or just one of many kids. 

But I reiterate that you need to stand up as a Muslim man and do the Islamically correct thing and support your wife.

However, if this is too much for you to do, recognize it now.  Don't let her down when she needs you most.  If you can't committ to sticking beside her the rest of your married lives, then you need to speak about that openly.  She deserves a man to stand beside her and cover her with love and devotion.