You need to have a frank discussion with her and revisit your living arrangements and agreements. Time to modify or move out. She needs to look for other means of transportation, there are agencies that can help her. She needs to pay for her portion of the food too! Is she not on food stamps too? If not she should be then. You can also make it your ultimate goal for her to find another place to live and until she does these changes need to be in place. And who knows, once there are modifications made in your living arrangements and expenses perhaps it won't bother you as much. Good luck.