I'm a guy, and I have a friend (who is a girl) from Japan who refers to me using -kun, but I have still been using -san. I was wondering, should I continue to use -san, or use something else (ex. -chan)? Not sure if -chan comes off as strange. If its super situational, I will just ask what they prefer, but just wondering what others think generally.
edit: should add, we are the same age and met online
by foolishwizard0