I agree with Leed.
Is your dad trying to get you on his side? I hope he isn't. Do know that all couples fight occasionally. I'm sorry your parents are at this point where they just aren't getting along at all.
Is there any place you can go to get away from the din? Maybe to the library or coffee shop? I am not sure there's anything you can do personally. It wouldn't be right for anyone to expect you to be a referee.
As far as friends, we offer the chance for folks to make friends here, as a start!