We both care very much about him, and considering our various...histories, with him, and my relationship with him...well, I don't enjoy putting him in the middle like he has been. I'm don't want him to feel uncomfortable regarding the apparent animosity between you and I, so I think it's time that we put that aside and at least make an attempt at being civil - if not friendly - with one another.
Fred, I know you don't like me. I don't like you either. But in my line of work, I deal with people I don't like all the time and I manage to get through the day just fine. I'm willing to at least attempt to get along, if you are. Else, when times come that we are put in a situation where we are near one another, things could spiral downward fairly quickly.