/cgl/ - Cosplay & EGL

We we playing truth or dare at like 1 in the morning at one of my first cons (I was like 15 i think) and I was dared to kiss this older guy and so I did. Only thing was that he basically brings it up whenever we meet at cons nowadays. It's really unsettling since he says shit like "Aw, I wish you'd stay young forever!" and "Remember when we kissed? You were so cute!"
It's even more unsettling since he has a girlfriend and keeps saying this shit to not only me, but some of my other friends too. I've tried to tell him to stop but he just pulls the "Anon-chan so tsundere!" shit with me and it just makes it all much worse.