No, he can't just stand here and watch you interact so well with another man other than him. But he can't do anything. You two don't have a relationship, something serious, it's just something casual that happens from time to time. He couldn't let anyone else touch the body he was obsessed with. He didn't say anything, but he walked over and sat in the middle between you and the man, pretending he hadn't found a seat and was paying attention to the teachers' meeting.