My H treated me like garbage for a long time after the bomb. For a long time I let him treat me like garbage but that is another story.
Our separation was final on 11/17/09 and I cut off ALL contact with him. He texted me on T-day and I ignored him. THREEE WEEKS later I got a long e-mail from him about how hurt his feelings were on T-day that I never responded to his text and how he guesses he better get used to me treating him this way and blah, blah, blah. Boring, lame... you know the drill.
Some WAS's have this odd fantasy they can treat their spouse like a second class citizens, lie, cheat, steal <insert transgression here> but figure once a bit of time has passed things will be "all good" and let's be buddies.
You are not your W's buddy nor should you want to be. You should view her as something in your past and as far as the present goes, she is nothing more than a major inconvenience.
At some point the WAS will get the message that bad behavior is not rewarded and it certainly does not result in a friendship. Some WAS take much longer to "get it" however the LBS can push that process along by SHOWING them... sorry, lady, I am out!