Indy,

You see this is where you get in trouble cherry picking information to fit your script.

Your W is in a relationship with another man. That changes the dynamic. As sick as it sounds you are now the OM.

She's not showing interest she is temp checking to see if you are on the hook.

A 4 hour conversation talking about the future is getting over excited.

Like V says, if you are standing then you are in a waiting game that will likely take years to play out.