Hey, you have been wronged in the worst possible way. Your good friend totally broke the "chicks before dicks" rule. And that is one of the biggest betrayals of all- the number one offense in the code of women's friendships. (In some ways, way worse than what your husband did, since men screw up all the time.)

The time for forgiveness is definitely not now and not anytime soon. You need
time and plenty of it to recover.

anyway that's my .02