We're sorry you have to back out of your Roommate bond, but things happen!
To Unlink yourself with your roommate, follow the path below from the Home Screen:
Home Screen > Friends & Messaging > Roommate
1. Check the box next to your Roommate's name.
2. Click the "Remove Roommate" button.
You and your former Roommate will now be unmatched and placed back into Unmatched Status, meaning you are free to continue networking and finding a new Roommate!