That really sucks, but I know what you mean. My bf gets jealous when I talk about other guys...Especially now that I don't live right near him anymore. He got really upset when my ex-fiance started calling me again. He just doesn't seem to believe that i'm not interested in the jerk anymore!
But yeah, if you fight about it that much, then i'd say maybe this break is a good thing. Maybe he'll realize what a dumbbutt he's being and stop fussing about it...Or if you decide you really don't want to be without him, tell him that you'll only get back together on the condition that he doesn't bring that guy up anymore. If he starts to fuss about him, interrupt and tell him you aren't going to talk about it, and hang up the phone.
Daile