9 Answers

Call, "Switzerland!" ... neutral.  Chances are high that this will happen again.  Say the word with flair.

Don't choose sides and tell them you won't do it............

Be honest, a good friend would not expect you to lie........

all good advice. also, i would tell them i love both of you. im not picking sides. leave me out of it.

That is very immature, it's their fight. Stay out of it.

Two best friends, the fight shouldn't last long. You can stay out of it, and make that clear, or you'll be sucked into it. Later you'll be the one that loses when they make up. You didn't side with both of them. The one you sided against will not be so quick to forgive.

After all is said and done, the best friends are back together, you hurt one's feelings by not picking them. You will no longer be their friend. They will stick together. It's a head game stay out of it.

Yes, not picking sides is the wisest choice, that way no one feels betrayed. Tell them that you don't think that it's right for friends to be fighting, and your not picking sides.

Are they best friends with each other, too?  Like, the three of you are BFF?
If that is the case, you have the best advice here.  Don't take sides. Let them work it out between themselves, and FOR SURE, tell them you WILL NOT be disrespectful of EITHER of them by listening to THE OTHER ONE.  OFF LIMITS.  

Sit on the sidewalk eat an ice cream tell em to duke it out their problem not yours.