Réponse :
Hey my friend. I don't think putting revenge on Alex's life and reputation is a bad thing. Think about it. You invited everyone else in the class except him. What are you going to feel? Anger. Maybe he said bad things about you by spreading rumours, but revenging? I think it is both equal because you didn't invite him so he felt sad and he told rumors so he is sad. I think forgiveness is always the solution. I think you should tell him sorry that I didn't invite you in my party but saying rummors were rude. And he might answer I'm sorry too. It's your choice so good luck.
