My husband cheated and cant remeber, how do I deal with that?

About a month or 2 ago, my husband and I were out with friends. He is a very outgoing and , yes, flirty guy and that has never bothered me, I dont even notice anymore. So when I was approached by the owner of the bar, a friend of ours, and told that the (female) bartender had complained about my husband's constant advances and propositions to her, I was in total shock. I grabbed his arm (as he was still leaning over the bar talking to her) and told him to come outside. I told him what our friend had come and told me. He lashd out at me. I can't even remember what he said now but he yelled at me and made me feel like everything was my fault. The next day, he couldnt remember anything because he was drunk that night. I have to deal with this and he cant even remember. We have talked a little about it but that is hard since he doesnt remember. How do I work through this by myself? I dont know what to do. I cant seem to let this go!