Domestic Abuse

Hello, My self Sushant and i'm staying in Gujarat, India. I do have a girlfriend and we want to get marry as we are facing issue from her family. I'm 21 and she's 22. We were working in same office. Her family is orthodox and she do have two elder brother who take all the decisions in home. (there is no issue at all from my family) When they got to know about us they stopped her to go out even stopped her job (from last 3 months) also and took her phone and forcing her to leave me and marry in her society. Now the thing is she's very upset with this and want to take a step but she's only scared of that what will happen to mom because she only have respect and feeling for her mom however her mom is also not support her and she also says the same thing as her brothers that get marry in her society. Now here we actually don't want to get marry right now as we are too young and also first want to make are career but this all things forced us to get marry else they will get her marry with any other guy. Now we are thinking that she should move out from home as like this she'll not gonna get anything, will not be able to make career or we both also not be able to stay together, while we are thinking about this there is thought that if she'll take this step there will be so many hard reaction from her family also she will lose her family. So this is the all situation now i want to know if she move out from home (she will live in PG-we both not gonna live together). Shall we get marry to avoid all this reaction as we'll be having legal rights to stay together. (as i heard about that it will take 3 months for confirming the registered marriage and in that if any dispute happens before that duration that can effect the marriage also heard about NOC) what legal action her family can take and what we can do against it, any application which we can raised in police station or in any women's counselling that she's moving out on her own and there is no one involved in this and she want to stay out (we do not want that from any legal action her family suffer or officers visit them and any issues happens as i don't want that effect their name in society). What can be the better way to get out of this situations and make things better. Please Suggest. Thank You!