I think this is good advice, in that we can only control ourselves and nothing outside of us.

I do not have anything to add as I know how it feels to be cheated on. Trust that is broken no matter how you look at it, is hard to rebuild when soemthing like this happens. In my opinion it is UP TO HIM to fix this and do everythign he can to repair the damage of the trust between you two. It is not on your shoulders to fix this and if he does nothing, I question his commitment and how serious he takes the whole thing. I don't know what he's doing, only you can say but release yourself of the burden that it's weighing so heavily on you.

For you, again, you take care of you and be independent so that no matter what he does do, you will be ok. If he makes amends and does the right thing, and you stay with him and make it through, being on your own feet, independent is still better than leaning on him and depending on him too much for your own self worth. if it doesn't work out and he messes up again or doesn't do anything to fix things, you're still better off because you're depending on yourself for your self sufficiency, worth, etc..