"Loving detachment," done properly, does NOT equal "shutting her out."
What you want to convey is "Hey, I'm busy over here, getting a life, and I really don't have the time nor the inclination to get into a bunch of negative R stuff with you right now, but if you want to talk, I'm sure we can set up a time soon to do that. See ya -- gotta run."
(these aren't words you SAY to her, but rather an aura you want to project).
