When I have traveled with a friend or loved one, there has almost always been at least one major fight, which makes me think that it's got something to do with me Being constantly together can get wearing on some couples. However, in all these cases the trip never was the cause of a break-up and I have good memories of all these trips. But some agreement on where to go, where to stay and what to see are kind of important and and the fact that from the outset you and your friend are having trouble agreeing on ANYTHING about the trip is not a very good sign.