So there’s a guy at the office where you work, and the two of you were introduced by a friend. After saying hi to each other, you each went off to do your jobs. In the middle of the day, you get a message from him asking if you want to have lunch. There’s nothing wrong with it, so you agree to his invite.
From that day on, the two of you become inseparable. You leave the office at the same time, you grab lunch and take coffee breaks together, and you call and text each other throughout the day. You might say that he’s just your friend, but the truth is you’re having an emotional affair.