Does a drunk kiss count as cheating? I don’t think so. What was the relationship with his ex at that time? She’s an ex now. Did the drunken kiss contribute to the end of the relationship? Or, was it a symptom of a bad relationship? I don’t think you should worry too much about it. BUT: In my opinion, everyone is a potential cheater. It just depends on the situation. So don’t worry too much about it.