Infidelity Support Group
Any relationship in which one partner engages willfully in sexual relations with another outside of the partnership is considered to have experienced infidelity. This breach of trust is often traumatizing for the faithful partner as well as the relationship, and support is often needed to heal emotionally and to decide whether or not the relationship should continue after...
My vote is, ask him and follow his lead. If he doesn't want to celebrate, that's fine.
When our anniversary came around my husband left it up to me to plan or do whatever i wanted (he usually does the planning for trips). I planned a weekend in a condo out of town, had a few things planned. It was a good trip in all but of course the day of our anniversary was a very tough day lots of crying and emotional. So i recommend offer a few things to your husband and see how he feels, and if he even wants to celebrate it.