Do you want him to chase you, as the unattainable WAW, or for choosing to be in an intimate relationship with his best friend?
I don't think the two need be mutually exclusive, but if I had to choose, honestly bridge, I'd choose chase. That he started seeing me as his "best friend" is a big part of the problem.
Isn't the desire to win someone back a powerful motivator to deal with your issues and be a better spouse? It certainly seems to be for a lot of guys here.