Then some time passed. I still feel that this person had done evil but have lost interest in talking about it. I now regret what I said earlier.
From this I learned a life lesson. When angry - wait it out, hold on, do something else. Tell your yetzer hara that you will give it a fair hearing at a later date. When this later date comes you will no longer feel the need.
שומר פיו ולשונו - שומר מצרות נפשו