Move on and go about your own buisness.
You are being set up to rescue her and her
pattern of finding a new one while still with
someone else could go on the rest of her life.
9 times out of 10, she will be lining up her next
one while your still living with her or your stuff
is still there.
Find a woman who is okay being single and has
been for quite some time. Otherwise all the
bullshit overlaps and you are in a relationship
that is anything but healthy. She will project
all her insecurities and trust issues onto you.
All patterns tend to repeat themselves, until
people take the time to work on their shit.