Friend, I am very happy for you, because what is certain is that your girlfriend loves you very much, but she wants to leave you for some reason, but she cherishes your fate together, so she recalls the light fate instead. As for the reason why I can't leave you, I analyze three points:

1: Something happened to her that forced her to decide to leave you.

2: You did something wrong; Let her heart cool;

He is dissatisfied with your present situation, confused about your future together, and can't see the hope of a happy life.

So you have to find out what the reason is first, and then tell her specifically according to that reason, so that she can feel happy with you all her life, and then you can give her the life she wants.