Marrying a girl who is 8 years younger than me

Dear friends I m Nishant, me n my gf are of same caste both of us belong to good families financially sound but problem is I m 8 yes elder than her,she proposed me wen she was in class7 n I was in grad2nd yr today it is a 7 yr relationship. She is 19 m 27 nw we wanna Mary so that my parents stop searching gal, but we can't let my gfs parents know about our marriage ,its just a backup plan in case her parents never agreed I will disclose that we are already married else we can have our marriage arranged. Kindly help me know a right legal possible way to marry without letting anyone know.....plz guys I want her forever

She is 19, she is now a legal adult and can take her own decision, legally they can't marry her against her will. But I don't think you should marry against parent's will, its better to explain them then taking any such decision.

Here I think, since you already have your plan, better consult a lawyer and pay small fee as its about your life and a Lawyer can help you better in terms of legal issues.