Friendship between human and horse does not allow any force. Like each friendship it must happen on the base of free will and choice. Freedom of choice for the horse. Then the flower of friendship can blossom. :)
Memeber of Academia Liberti have gone through changing process in the relationship with their horses. They have quit to ride for years in order to develop friendship with the horse, to give them time to heal their wounds and they offered true friendship. Without any wish to mount the horse, they have put themselves back to show to their horse that they love him just because he is. This is friendship. This is love.