Me and my bf have been together for over a year and i dont no y he is acting different.?

recently me and my bf are getting in more and more arguments and he not am to tell me how he feels.. or what i did exactly to make him mad. he just does not tell me and expects to me read to his mind and no everything. what am i supposed to do with the fights.. just forfeit?.. is he trying to break up with me, does he not care anymore?