Hi! im doin the main quest diplomatic immunity and i have to get in to a party so i have to talk to Delphine but she attacked me! why?! i didnt attack her and never have. i have done other quests with her. is there a way to fix this without starting over?? please help.

I've heard about something similar from someone who killed a chicken in Riverwood. If you're a criminal there, she'll treat you accordingly regardless of where you are.

well the guards and people who lived there didnt attack, do you know a fix? i dont wanna create a new character again -.-

Check UESP for journal codes and update it through the console,I'd say.

Go to the major city you last visited and talk to a guard there, you most likely have a fine. It happened to me as well, had a 40 septims fine in Windhelm.

Fixed it, i just had to wait and do some sidequests and now it works. Thanks any way!