[DamnthatDavid]

God, I feel your pain. 2 female friends all of a sudden don't talk to me, don't chat with me, don't want to hang with me. (well... I admit one was my fault) but the other? She became ice-bitch cold extreme. And I just came out and asked her.

Basically, just cut the cold shoulder crap, and toss in some drama yourself. Girls love drama, and if you pile it on, they respond.

Try something like
"[insert name], did I do something wrong? I don't want to completely forget our friendship just yet. I treasure friendships deeply, and the thought that I ruined this one is driving me insane. If I did anything wrong, I apologize"

Take all the blame. Girls like to be right all the time.