I cheated (a lot) how do him and I kick start fixing this.

So over my 2 or so year relationship I've done some things he knows about and some he doesn't. Naturally he is hurt and recently after a big incident he said we were done. We spent a short period where we didn't even hang out then we gradually became more actively hangout with friends and ourselves again. 
He came to me the other day and said he wants to just start over clean slate. 
But the problem is I have broken all trust, and of course I want him and he said he really wants me and I really want to be my best for him I let him see my phone whenever (he doesn't ask often) but the distrust and bringing up the things I've done still happens. I understand that's natural.
He is apposed to therapy, and I just was wondering if anyone had advice on how to get over that first hump. 
IF YOU HAVE RUDE COMMENTS TO RIP DOWN MY CHARACTER OR BASH ME FOR CHEATING DONT I KNOW I AM IN THE WRONG I AM NOT DEFENDING MYSELF I AM SIMPLY ASKING HOW TO MOVE PAST IT SO PLEASE DONT SAY ANYTHING TO MAKE ME DWELL. Thankyou