I don't see the point of all the big sticks to beat the OP with now. She ended the affair, says she was sorry about it, underwent counselling and thought they'd moved on with their marriage together over a subsequent 7 year period.
All these years later she discovers that her husband has his doubts about whether to continue in the relationship, which, of course, he is perfectly entitled to decide.
That's the reason for the timeframe information, not necessarily to minimize.
Surely the best help for the OP is to explore where they are at this point in time and how best to move forward, whatever the outcome for both her and her DH. She says she is sorry, he is closed to her, alternately shouting or giving the silent treatment. This is not a pleasant or happy situation for either of them.
For a time she gained things that were lacking in her marriage, but she obviously knows the affair was as ill advised as it was wrong. The question is, can the marriage be saved now or is it better to part. It's no good staying together because someone wants that if they aren't prepared to back it up with feelings and behaviour.
All things considered if it were me, I think I would move out to my mothers and keep a dialogue with DH to see if we could work things out or not. I don't think I would want to make a life with someone who wasn't affectionate or empathetic, regardless of their reasons.
It's sounding to me as though OP wants a marriage which is different from the one she has and that DH no longer wants a relationship with the OP, but doesn't want her to be free for anyone else either. If that is the case then the only outcome is prolonged misery for both parties.