In fact, fate itself is amazing. It is possible that a small change in your mind will produce great changes in your future life. Maybe you and that classmate were hardcore brothers in a previous life. You made an appointment in your last life, and you will be brothers in your next life. Fate did let you meet and have an intersection, but perhaps because of such a small idea, you all missed it. This is the legendary' fate is not enough'.
Of course, most people will think this is bullshit. Who cares! ! !