@bwise1966,
No matter what, there has to be limits or boundaries one can allow in any committed relationship. No one is a bad person or unloving when they have to break up because the circumstances are no longer workable.
Sometimes circumstances can go beyond how much love one can muster. This living situation and the circumstances I'd find as unlivable and unacceptable. If she were take someone in...without having the financial means...that is behavior that is not reasonable or responsible. That girl needs her family and is their responsibility.
FWIW, CPS should be contacted if her living circumstances aren't suitable. however, your issue is that it wouldn't work for you. She also is acting unreasonably towards you thus giving you no choice. You should looking to find a new place to live if she is going to go that route.