Use this time to build yourself up. Don't put any demands on yourself concerning staying or leaving, you have been through a great deal and need time to overcome the betrayal and trauma he has caused you.
Just as if he had beaten you up physically, you need to repair whilst living with your offender.
Now that's hard, to be able to recieve remorse from someone who actively sought to cause you a greal deal of pain is utterly confusing.
See what he does, what he offers, make him do the work, don't try to work him out and why he did it. Look after you, put yourself first, be selfish and try to re-build your confidence.
You may find your confidence does not return whilst living with him, so if you cannot forgive, give yourself the gift of time.
You can change your mind at any point 5 months or 5 years down the line, he deserves no timetable for you returning to the loyal happy devoted wife you used to be.
Oh and if you fancy starting out with someone else in the meantime, do so, he deserves no fair warning of your future relationships, he lost that entitlement the day he betrayed you.
Good luck, may you grow stronger.
x