I really do believe that if the WAS is going to return it only happens when they truly feel they want to. And sadly, your W has not given you ONE glimmer that the thought even crossed her mind.
BUT *any* gesture she does you take to mean way more. Like the last time you saw her and she smiled you wondered what that meant. Well, nothing. People smile. People frown. It meant nothing more than at that moment in time she felt like smiling.
You have not been able to let go as of yet. If there is a time to let go it is now. Not because every single person reading this doesn't want your W to come back but it is necessary to deal with reality.