Funny you quoted that line .. we just had a discussion about that very even on another thread ... I am one who did not help W move just as I did not help her D ... I see them as one in the same ... they want out .. they can do the work.
The GAL thing .. you treat them as a neighbor ... would you be rubbing your neighbors back after they broke up with their boyfriend ... probably not, use that as a rule of thumb .. be nice and courteous but have your boundaries till they end the A, and say the magic words "I will do anything to save/work on this M"
I can not recall how long the A went ... but it may take her a bit .. even longer since she worked with him and will have reminders at work about him. Let her process this while you do your own thing .. she can not miss you while she is missing him ... and she surely can not miss you while you are pampering her during her OM mourning sessions. Become a man who she respects, someone who is sure of himself.
Keep reading, learning ... and start applying this approach. Trust in the process. Not to save your M .. .but to save yourself .Check out a book .. NMMNG .. might help you.