If I were you, I'd consider doing the 180. Sounds like your husband knows you are always going to be there, and so you are his back up plan while he is off with OW. Let him know you are moving on... Find a hobby, join a class... You say he knows your schedule, so maybe mix it up a bit to keep him on his toes.
H39, W39 T18, M16 S9, S7 EA suspected 11/15 ILYBINILWY 1/16 Counseling 1/16 - 6/16 EA confirmed 1/16, ended 1/16 H signed lease to move out 8/18/16 (day before our anniversary)