Dude, you have to stop listening to her, she FEELS hopeless, that doens't mean YOU give up, it means YOU OFFER her HOPE by becoming the person she wants...she threw you a rope...use it.
Well done on controlling yourself. Honeslty, she's miserable right now and scared, she needs you to be that guy NOW. SHow her you can be that guy now. Work your arse off..help her get into school. Don't make promises, make it happen.