my best friend and i fight all the time. people tell us that we act like an old married couple. but it is the time that we arent fighting that makes everything ok. we have our fights, and even if they are about something that is not a small issue, we make up fast. if this isnt happening with you then one or both of you have to give when your in a fight. as long as you have great times when your around her, when your not fighting, it should balance out the fighting and your friendship will be fine.