I agree with Patty and will add that the most problem horses to me? Are the ones that want to be their horse's best friend and baby them and instead of telling them to do something, either on ground or under saddle...they baby talk to them.
All of which makes a monster.
All horses will, with a few exceptions behave exactly as this one does for you. You have to be the leader. If not? You will be the follower and that is not good.