I kissed someone

Me and my husband we went to the club 2 weeks ago. We were dancing getting drunk and having fun. After a while, he disappeared. I went to ask the security guard if he saw him, he said he left with a girl. I went to the bathroom didn’t see him. I went and asked the bartender, he said the same thing, he left with a girl. Another security guard said the same thing. So I left the club went looking for him, didn’t see him. After that I remember seeing him after 10 mins or so and he was so defensive and angry. We argued and he left me there at like 3 in the morning. I guess I called my best friend after that, I don’t remember calling her, but she said I called her crying and that someone had asked me if I was a prostitute bc I was on the street by myself. And my best friend said as I was crying with her, a guy asked if I was okay then I told him everything and I got in his car bc he offered to help me find him. He drove me around, we didn’t see him, I was calling my husband and he didn’t pick up, at that moment I was so angry and I said okay I’m gonna do the same thing. This is when I remember coming back from being “blacked out” and I gave him a peck. But nothing else happened, it was out of anger and feeling betrayed. My husband called after that and the guy said I’ll drop you off to him and when we went back home my husband said he was throwing up. I believe him, and now I feel like a liar and a cheater. I don’t want to tell him and only create more trust issues bc I reacted out of anger but this guilt is killing me. My husband said if I had kissed him or done anything he will divorce me and I don’t want to lose him. But I feel like the worst person ever.