i don't get it

at the end of the school year me and my mates were all a bit grouchy i just blamed it on the act that it was the end of the year and we were just tired but the other day we all met up and it was just worse but the snarky remarks were aimed at me and i have no idea what i've done to upset them i've just been my self and i'm just fed up with it and if it carrys on at school this year i have no idea what im going to do because they're my only friends everyone else hate me. :'(