Just a couple quick observations, Buxom. You made a couple comments about reconnecting and "maintaining the connection". Yes you want to stay upbeat and positive, be the lighthouse, etc, but it's not your responsibility to seek or "maintain" a connection. It's an important distinction because if you view your goal as maintaining a connection you might judge the success of your actions based on how your H responds, which can lead you away from being detached.
Indeed, something said a lot is that things may get worse before they get better. As you're seeing, you standing firm has resulted in your H seeming more withdrawn. Once he sees you're not chasing after him, he unfortunately may try other, uglier, tactics to make you feel guilty or get you to cave in. If he does get distant, frustrated, mad, despondent, says hurtful things, or whatever, that is not a sign that you did anything wrong. Sometimes things really do get worse before they get better.
Me, WW - Upper 30s BD - Apr 1 2016 EA - Apr 7 2016 (discovered; ongoing for months; did not confront right away) Confronted wife about EA - May 17 Wife sent NC email to OM - July 11