house guest will not leave...has already stayed longer than the 2 weeks we agreed upon...no money of any kind has been exchanged ...get her out please
Since they are not a tenant (not paying rent or utilities) they will be considered to be a "licensee"; that is someone who entered and remained on the premises with permission. Now that such permission has been revoked the lawful way to remove them from the premises is to serve them with a notice to vacate the premises. If they fails to leave at the end of that time you will have to go through the requisite procedures for eviction in your state. Once the court enters an order for the tenant to vacate the property it will be enforced by the sheriff, using physical force if necessary.
Be sure to follow all of the correct eviction procedures. If you fail to comply with them you could find yourself on the receiving end of a lawsuit for unlawful eviction. And don;t use any "self-help" such as removing their belongings or changing the locks; both criminal and civil penalties may be incurred if you do.
For the steps on how to evict a tenant, I have provided a link to a site that will explain how: http://www.courtinfo.ca.gov/selfhelp/other/landtenqa-land.htm