Like I said, she's hedging her bets. She wants to keep you around in case this new "pet" is not all he seems to be. She can then keep you until a better option comes round.
I couldn't have said it better myself. She's not yet too sure about this other guy, so she just wants you to stick around until she's sure, then breaks up with you. I know you probably invested a lot on this woman, BUT with the global financial turmoil, there is no returns at all.