Horses don't love. They don't give their heart away. They don't get broken hearts.
Horses "bond" to humans who show equine leadership characteristics. The strong a person is as a leader to their horse, the stronger the "bond" of that horse is to its human.
If you feel you are having a problem bonding with your horse, it's up to you to change your leadership abilities. Become more of a leader for your horse. Use your actions and body language to simulate the actions of a lead mare in a herd. Watch how his actions and body language change as you become a stronger leader for him.
All horses are looking for leadership, even the most dominate ones. A human needs to be able to recognize the differences between horses and change their leadership accordingly.
If you are really interested in this stuff, check out a fellow by the name of Marv Walker
. Visit his website and request The Bonder via e-mail, then order one of his dvds.