Even if the marriage is not healthy, even if it is abusive, one choose to be still married because either cannot imagine living by themselves, too tired and just accept that this is fate , or economically dependant (usually woman).
Aun si el matrimonio no es saludable, aun si es abusivo, uno escoge seguir casado porque no se imagian viviendo solos, están muy cansados y simplemente aceptan el destino, o son económicamente dependientes (por lo general mujeres).