My guy best friend won't talk to me?

I think honestly, you were being immature by making a haste decision to end the best friend status. It truly probably hurt his feelings a lot when you said that. How long have you been friends? You probably should apologize and explain to him why you said it. Because more than likely you didn't really mean, you were just mad. I think you should definitely talk to him and try to work things out.

no? you told him that your not friends anymore.

No he has a right to ba mad at you. If my bestfriend told me we werent best friends anymore Id seriously never forgive her, Id talk to her but Id still not fully completely trust her

just tell him you were so angry that you spoke something wrong, and he is always your best friend and apologies.
I think you really broke his heart by saying that because you know, boys are softies! Well, i've had a same experience doing this to my best guy friend and i just gave him an official apology and problem solved!