"Nevertheless, Haman restrained himself and went home. Calling together his friends and Zeresh, his wife, Haman boasted to them about his vast wealth, his many sons, and all the ways the king had honored him and how he had elevated him above the other nobles and officials." NIV translation
Now we see the pride coming out as Haman went home and gathered everyone to hear how great he was. He boasted of his wealth, family, and his job and promotion by the king. We may easily see how he is bragging it up but we have to ask ourselves if we do the same thing at times. If we do, then we must repent and ask God for forgiveness as pride in ourselves is not of faith and does not come from God.
"'And that's not all,' Haman added. 'I'm the only person Queen Esther invited to accompany the king to the banquet she gave. And she has invited me along with the king tomorrow.'" NIV translation
Haman not only brags about what he has and his position but he brags about who he knows.
The same thing happens today as many will do anything to be associated with someone who is rich or famous as they think it makes them look better. Really, the only time that it matters who you know is whether you have a personal relationship with Jesus Christ.
"'But all this gives me no satisfaction as long as I see that Jew Mordecai sitting at the king's gate.'" NIV translation
Haman was not satisfied with all of the things that he boasted about because he was consumed by hate. Contentment is a gift from God while hatred is a curse of the devil. With God you can have peace and contentment but there will be no place for hatred in your life.
"His wife Zeresh and all his friends said to him, 'Have a gallows built, seventy-five feet high, and ask the king in the morning to have Mordecai hanged on it. Then go with the king to the dinner and be happy.' This suggestion delighted Haman, and he had the gallows built." NIV translation
His wife and friends told him to have a huge gallows built and to hang Mordecai from it. They wanted it to be seventy-five feet tall which is much higher than needed so that everyone would be able to see what happens when you mess with Haman. Because of his pride and hatred for the Jews (anti-semitism), he gladly had it built.