Lee and Longsreet

As I have been reading Killer Angels, I have sensed a conflict in Longstreet as it pertains to his relationship with Lee. He holds Lee in the highest regards, but he is extremely frustrated when Lee doesn't listen to his advice and suggestions. Lee's ability to forgive Stuart and to proclaim the second day of Gettysburg as a near victory, in spite of the high numbers of losses, seem almost inconsistent with the military genius that is nearly worshiped by the South. I sense a twinge of jealous in Longstreet, but a fear of ever making it known (even to himself) because of the deep respect and admiration that he also holds for Lee.
I love the complexity of characters that Shaara has been able to create in his book. It gives the book a sense of realism.