Fights are OK, not listening isn't: A good, honest friendship between two adult human beings is bound to be fraught at times, so if you generally have a good relationship with your friend, and have occasional blowouts, realize that's perfectly normal — and it's pretty great that you and your friend can speak openly and honestly. As with any relationship, it's great to talk it out (and reconnect) after a fight, once you have cooled off. But if you routinely argue with your friend, and he or she refuses to listen or acknowledge your point of view, or the friend repeatedly brings up topics about which you always disagree simply to provoke you, or talks over you (basically talking at you but not with you), that's disrespectful. There's a difference between honest agreement and provocation.
