Okay, guess, I can say I'm very well experienced in your current dilemnia. Although, in my relationship, we never went all the way, he believed in sex after marriage. It was the best time in my life w/ him but also the worst. Eventually, he'll want you to convert, and that's when the trouble will really begin. This is a fact, not my opinion.
I find it incredibly hard to believe that he would have sex if he was an active witnesses, the guilt factor would overwhelm him. I don't believe their is anything like a weak or strong dub, cuz the religious convictions live on in their brainwashed head regardless.
I decided for my own mental health to break up w/ him, and even though I still am maddly in love with the idiot, and him with me, there is no way in hell we can be together, the religous crap seems unimportant now, but it will soon bombard you.
Sometimes, love is letting that person go, true love anyway in my opinion. I love and miss him, but I can't be what he ultimately wants me to be, and he won't meet me half way.
If you need someone who has been through it and then some w/ a crazy relationship w/ a dub, please email me, my email is always open.