He might still roll over after the act is completely done. It may not be a sign against you at all, it simply indicates his comfort level.
I personally prefer to hold my wife in a spoon position. But I have been outside of the residence for 6 months now, and out of the bedroom for 6 months before that.
12 months....that's rough!!!
I guess I wouldn't take it so personally (the rolling over) if there were other signs of affection going on. Right now I just hate the feeling that he wants sex, not that he wants me.
And of course, it makes me wonder if there is OW involved - the lack of affection towards me - if there's an EA going on or worse. (Just started a thread in the infidelity section about that.)