It looks like that you are in a one sided relationship. I wonder if she ever really wanted to build a future with you. These days, saying I LOVE YOU without life long commitment is easy. You might need to be realistic and take her feelings into consideration. You might have to deal with a broken heart if she doesn't relent because forcing her against her wishes could be detrimental for your relationship.
Health Tips
Please see a counselling psychologist for an evaluation, coping with the loss or making an attempt to come to a common ground and understanding what is the best course of action from here.