One time I was with my friends (three girls, two guys, and my boyfriend) for one of my friends birthday parties and got drunk, eventually we decided to play truth or dare and I got dared to kiss one of my friends, I kissed him lightly on the lips and I didn’t think much about it because we were friends for a really long time. My boyfriend was there and didn’t say anything at the time so I assumed it was fine and I didn’t realize he was upset but he ignored me for the rest of the night and then was mad at me the next day. He said he didn’t like it and said some mean things about my friend, I said I was sorry and that it didn’t mean anything. He didn’t really talk about it again but I’m wondering if I was the asshole in this situation.