Guess I don't see the problem lying to her in this situation, but then I'm a newb who's making no progress in my own sitch.

Or make it not even a lie by making yourself busy and having fun?

Me: 46
W: 44
Married: 17
Together 21
D13; S10
BD: 03.03.15 (Not attracted to you)
Almost 2 years trying, alone, to save marriage
Status now: Divorced (effective 06.13.17)