My thoughts, exactly.
The girl is just wasting her time... if she knows there is no future, why not get up, dust off, and move on. She has already wasted so much time on someone who has no intentions of marrying her, she needs to break loose of the "relationship" (or the very little that remains of it) and find someone who is willing to make a long-term commitment to her.
There is absolutely no need for her to linger around in an attempt to give the guy a "taste of his own medicine", when it's clear to her (and all of us here) that he has already moved on (emotionally, mentally) - it is time for her to do herself a favor and put an end to it all. She deserves better.
Exactly!!