If this was something just personal then I'd legit just never talk to him again. But since it's business I would imagine that you have to rule out emotions and objectively seek a solution. This would involve confronting the ENTJ about the issue, understanding why he's doing it, and coming to an agreement about how these situations should be handled in the future. If an agreement cannot be made or his behavior doesn't change, then it's really up to you what you should do next. Just remember to make sure your mind is clear and free of emotion before you make your choice. That's the best advice I can give.