It sounds like your H is not truly remorseful, and without that, any reconciliation is not going to be honest or lasting. You need to set strict boundaries for him and make him honor them. He should be trying to win your approval right now, not the other way around. You can work with a MC but I think that unless both parties are truly committed to identifying and resolving issues in the M, then it is a waste of time and money. Perhaps your H needs some IC first, but from the sounds of it, he's not even willing to own up to his own issues, and how badly he has hurt you.
Do not allow him to blow this off, and just continue on like it never happened, or you will be right back in the same position in a matter of months. You have to decide how much you are willing to tolerate and be prepared to follow through with whatever consequences you decide are appropriate. Reconciliation is wonderful when both partners are committed but from the sounds of it, you have a H who just wants to sweep it all away. You deserve more than that.
Me 47 W 42 T 24 yrs M 18 yrs W living with OM BD1: 3/7/2015 (A with OM#1) BD2: 4/11/2015 (A with OM#2, W moves out) WW filed for D, papers received 9/18/2015. Meeting to determine child custody 9/29/2015.