Melancholy brother
Maybe you should take it seriously. Why does your girlfriend hate your concern? First; She is a single parent! Have a depressed brother! There is little savings at home now. Second; She doesn't want to involve you! Third; She wants to be free! The above three points should be correct. So it depends on how you understand and deal with it! You love her! If you want to help her, you can accept her status quo, then you can help her. If you are afraid that her family background will bring inconvenience to your future life and work, then you can't help her.