Confronting a roommate is a tough thing to do, especially if you see each other everyday, but it has to be done when she doesn't even realize that she's being inconsiderate. Is she a slob who never picks up her dishes? Don't let things escalate - mention your feelings early on, so she knows that you don't enjoy a sink full of dirty bowls and plates. She may need an occasional reminder, but if you wait until things reach a boiling point, you won't be able to calmly articulate yourself and feelings will end up getting hurt.
Does your roomie have no sense of your personal space? If she's constantly barging through your closed door to talk to you about the latest trivial details of her life after you've just gotten home from an exhausting day at work, you'll need to tell her that you appreciate your private time. This can be tricky to do without hurting her feelings, so again, don't wait until you can't take it any more - mention it gently when you first start to feel irritated.
For more advice, contact a psychic. Our gifted psychics can use their powers of intuition to see how to best resolve conflict with your roommate.