That is so wrong! If she doesn't want to marry you & you then go behind her back to her parents & they force her into it (or even persuade) that would make you a bit of A'hole. Sorry but that's how I see it.
You can't force someone to love you. Find someone you can love and will love you back. Then you will both be happy. Don't waste one more minute on this.You want someone that will want to be with you, not made to be with you.
Life is too cool to want to hang out with someone whom you already know doesn't want to be with you. Trust, respect and caring are all part of life. I would seem you would be missing, well, all 3 right out the gate. I'm sure your life and hers are worth more than you trying to make her do something she doesn't want to and her being flat out miserable. Try some where else. There are many people out there to choose from. Think before you take any further action.