Use anger as fuel for your sobriety.
You said it yourself - his behavior should have no power over your sobriety. The first of many times in sobriety that you will repeat this mantra to yourself.
In the end, it is simply you and your sobriety - all alone, in a vast landscape populated with shadows of people and feelings.
You deserve to be in a relationship that you can trust, to grant your love to a person you can trust. That can't happen until you close this door completely (and firmly lock it). My (unasked for) advice is to go "no contact" ASAP, or you will keep dancing with the hurt and you sobriety will be challenged over and over. Use this moment to dive into sobriety without any reservation - just leap.
Everything is going to be ok. It will eventually be better.