Just saying I think I really want to stab the author I thought it going to be happy end but it make me feel shit

Poor girl. She has been manipulated and have experienced so much that she is willing to go to the person she wanted to get away from just to have the same exact thing done to her again. She got so used to doing things rough that normal sex is not enough for her. The boyfriend should learn how to make her feel good or else she is gonna keep coming back to her manipulator.