How did he "prove" to you that he ended the A? What was his proof?
The aftermath you're feeling is the reason many of us here - who have come out the other end of this beast - strongly suggest a full transparency plan at the very beginning of the "piecing" stage, when both partners commit to working on the M.
It's not good to beat the A over your H's head. But I've, personally, never seen a successful reconciliation when the person who did the betraying refused to openly and honestly address the questions and concerns of the person who was betrayed ... no matter how long ago it happened.
M: 40 H: 44 Married 14 years S11 & D6; D20 & D19 from previous M 2BDs/PAs, 8 years apart Piecing: April 2014