Court Marriage

Good mrng team! I m in a relationship with a girl of same religion but she is obc and I am General(Mittal). She knew her parents wouldn't agree for our marriage & suggested me to get Arya samaj marriage and then get it registered in the court(to be on a safer side so that her parents can't force her to merry some one else). We did so and even she filed a case against her father and chacha stating that they attacked us and took oath in front of judge in the court as well. She did not live me even for a day and has been living witht hem since they did not know about our marriage.Our intension was to meet her parents and try to convince them 4 our marriage. Now when we approched them they denied saying we can't give her in other caste. Now the girl is also backing out saying that i can't go against my parents and they r asking me to sign on divorce paper else they will file divorce case along with some other cases against me and my family. Though I don't wanna leave her. But if it can harm my family then I would have to. Can you please guide me what all they can do to me and my family if i don't sign divorce petition? And what r the advantages thta I have due to her oath in front of judge and law against her father? Please guide me.