Step One to Being a Cheerful Roommate...

Thanks to everyone for the advice given on this post.  I took your advice to heart and I assigned chores!!! It's been helpful because she knows what she in charge of and I don't end up having to try to clean the ENTIRE house by myself.  And I don't get grumpy because she is actually trying to keep up with her chores! Amazing what a little communication can do for you!