Well, I'd wait for some of the vets here, but I think you need to be true to yourself.
If it is not acceptable for you, then don't do it. If you feel you need to separate, then start the process of talking about it.
Head up blake!! Seems like you have decided what you want. But I would wait a few days to make sure it's what you really want.
M: 9 yrs T: 13 yrs H:34 Me:35, S4, D2, S 7 months Dday 11/12-PA & multiple PAs Dbing 12/12 S 1/13 7/13 H moved back in basement. 8/13 #3 born 10/13 still cheating 10/13 He moves across country, I file for D