Roommate moved without much notice
My roommate that signed a one year lease with me told me on the first of April that she will be moved out on the 3rd of April - no 30 days notice to my landlord or anything. The lease has another 4 month on it, and she did not pay the rent in April. She now also wants to pro-rate the utility bills, without the regards that there has not been a replacement found for her (I've been putting out adds and showed the room/house etc.). Per landlord both of us are responsible for the utilities and rent, unless one has found a replacement when leaving. I can't pay the entire rent nor the full utility bills.
What to do??