Forum:Skyrim help?

So I just started playing skyrim and I accidently attacked a person in Whiterun and now all the villagers want to kill me... I just left the town and figured after a while they would not try and kill me, but they haven't forgotten.... And Farkas seems to be the leader of the clan that's out to kill me, but he seems pretty important later on... Do I need to go all the way back to an old save file or can I fix it? >_<