Depends on what you mean by 'difficult'. And I wonder if this is really a matter of your perception of 'difficult'? End of the day you cannot expect to get along with everyone, and everyone has their own agenda. They probably also see you as 'difficult'.Rather than running off to tell teacher you need to sort this out directly if at all possible. Try a non-confrontational approach, perhaps go for a beer or something, and raise the difficulties. You need to frame things in the context of 'we' not 'you' i.e. we aren't seeing eye to eye on x, what's our best way forward on this?' etc not ' you are being difficult'.