I'm not expert (obviously, if you've read my thread) but I agree, Kyh - that "let's be friends" thing is to take the guilt off. My husband and I actually have been best friends since we got together in 1989. Now after BD, he regularly reassures me that he still thinks of me as his "best friend," even though he's putting me through more emotional pain than I've ever felt in my life and doesn't share anything with me, saving it all for his "platonic" OW.
I also have a lot of anger brimming beneath the surface. I seem to be in that stage of grief/LBS that is dominated by anger, which makes it hard to do the detachment thing and also makes you more prone to the crazymaking your MLCer puts into your brain!
Use your GAL strategy to take the focus off of what she's thinking and put it on something you can actually get some satisfaction from.
Me: 45 H: 47, M 23 yrs., T 27 yrs. S6 & S13 BD: 10/23/16 11/20/16: In-house Separation 12/5/16 H goes to IC , stops confiding in me 12/29/16: Start MC 2/4/17: Trial Separation/H moves out