Don’t show a friend your gift, or your bag of money if you still want to maintain your relationship, but if nay, go on, and all you’ll see is hate and jealousy, and you’ll fight with him in the street like a dog and all you’ll feel is regret.
For a sane person to sincerely be happy that someone has succeeded, they have to either be profiting or likely to profit from that person’s success, or be that person.