To be clear he was my first boyfriend (and I was his first girlfriend), and he iniated the breakup. He didn't see me as a girlfriend anymore, but as a person. It's been a few months but I still hold feelings for him and bitter over the breakup. But I will be attending a class with him in a couple more months, and I hope I will be better by then? I am really nervous and unsure about how to act around him at that point... Normally I'm very casual and friendly with my guy friends, who will also be at this class and are also close friends with my ex. I tend to smile, talk, and hangout with them a lot, but I'm not sure how he would want me to treat him. Any help?