A friend is moving to be closer to me. Is this psychopathic?

One of my good friends, who began counting me as her best friend after only a month, has decided to move house to be closer to me! I moved to a country town about an hour from Melbourne a little while ago, and now she is considering doing the same. How do I politely tell her that I find it quite disturbing that she is considering moving just so I can be there for her next time she has a crisis without offending her, or losing her as a friend?