Re: NC but still looking at her facebook page
If he is seeking her out, even to know ANYTHING about her, it's not NC. As WW who rationalized myself back into the affair and tortured my husband with a second D-Day, I can tell you that it's incredibly difficult but absolutely IMPERATIVE to cut all access to any knowledge of the AP. NC means no physical, communication, and most importantly for your recovery process - NO MENTAL CONTACT... Just like mind movies and things that the BS has to attempt to stop, WS have to STOP thinking about the AP, stop wondering, stop checking. That seed will sprout into a vicious weed that destroys all the progress you are trying to make. And he can't make an honest effort with you if he is still harboring thoughts of her.
He likely misses her. It will take time for that to pass. BUT it will never pass if he keeps feeding his hurtful obsession. My advice to you is to block her, and change his FB password so he can't access the account until he is through the worst of the withdrawal. If he can't understand the necessity of that for your combined health, then he really doesn't get what he has done to himself and you.
I'm sorry you have to struggle through this. But here is a situation where he clearly needs your help, even if he doesn't want it. All the best to you.
My spouse is MrMathias You reap what you sow, so think carefully about what you choose to plant.