How to make my cat comfortable?

sounds like she will be fine. she has familiar items, food,litter box, water bowl. leave your boyfriend the vets phone number in case he needs it and instruct him to clean the litter box twice a day. fresh water every day and more often if food or something falls in it. tell him to keep medicine, shaving cream etc out of her reach and be sure there is nothing in his room that can hurt her like medicine etc.also instruct him not to leave a lamp on in the room because if she knocks it over as she is sure to explore, the bulb can burn the lampshade and start a fire. all elctrical cords should be wound up and out of reach.also, very important, when you set her litter box up, put her in it so she knows where it is and that it is hers.tell him to put it in a corner away from the bedroom door or where there will be privacy and not alot of activity.