Re: well it lasted a week
The person that runs from conflict will be the one that will quit. It really doesn't matter what the reason is....but if she continually takes off and shuts down in the relationship, it will never turn out well. Either she will eventually leave; you will become a doormat; or you will eventually leave-affairs or not.
Marriage requires a form of conflict resolution. Running off and shutting down without resolution won't work.
Get some marriage counseling. If she is unwilling...you have your answer.