I am friends with this guy, we went clubbing and I kissed him then later kissed another guy during the night am I in the wrong?

We both thought each other was attractive but apparently he likes me which i didn’t know. His friends are angry at me because they think i “cheated” on him and was leading him on. Again, I didn’t know he liked me. However, me and him are chatting like normal and he hasn’t brought it up since. He did look upset and was silent when the group walked back home and i felt bad. Not sure if i should apologise or just leave it seeing as it’s been 3 days. I wouldn’t have even kissed him if i knew he liked me that much. i’m stressing
I am friends with this guy, we went clubbing and I kissed him then later kissed another guy during the night am I in the wrong?
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