To prepare yourself for the new living arrangement, you might want to consider your friend's astrological sign. If she was born between June 21 and July 22, this means that she's a Cancer. This sign is represented by the crab, an animal with a defensive outer shell.
In general, Cancers tend to be sensitive people who keep their true emotions hidden. They're very loyal, which is good news to you as the friend of a Cancer. However, it's important to be mindful of the fact that they can occasionally be needy. This might mean that your friend is going to want an ample amount of attention from you once you move in - be prepared!
If you're interested in learning about the compatibility of your sign with your friend's, speak to a psychic who specializes in astrology. A tarot reading can help you determine if living together will be the right move for you and your personal needs.