Horse help

Thank you for the quick responses everyone. I have a friend coming down this weekend with his horse to see if riding with another horse helps at all. If my horse trails behind another, I would be happy. I will definitely try some of the ideas that have been suggested here. But. hypothetically speaking, if I can't get this issue resolved, what kind of effect do you all think it would have if I got rid of one of the horses all together? Will the remaining horse be worth a darn? I defintely favor one of the two horses already, and i am not above taking one of them to the ole Parrish horse auction(Craig knows what I am talking about). Would the lone horse get over it, or do you think he would stil be looking for a buddy?