Send him a letter explaining how much you miss him.  Ask his forgiveness for any hurts he may have received, whether intended or not, or even known about.  The thing to remember is that people are very strange when they are stressed with family emergencies.  Also, he may be feeling guilty, or may be afraid of hearing "I told you so."  Under no circumstances should you bring up the past; let him discuss what he wants.  Additionally, if you do decide to meet with him, go alone.