A Slightly Funny and Scary Story

This happened when my ex and I were still just friends. One day, my ex and I were having dinner at the table. While we were chatting, I noticed someone hiding and watching us from not too far away. Their expression was quite contorted, as if they were thinking, 'Why isn't the person sitting next to me, laughing and talking with me, her?' And that person was actually someone who was pursuing me. As soon as I noticed her peeking, she quickly ran off. What was scarier was that the next day, she acted like nothing happened and greeted me. I don't think anyone would want to chat about personal matters with their boss and become friends, but would rather choose their ex, who is closer in age and has a brighter personality, as a friend.