I wish you the best. Only you know what it is that you need. It sounds like you have already given much thought to your situation with your wife and have reconciled your feelings in you mind. Be understanding of your friend, she may not be able to seek outside relationships with out feeling guilty about her husband. Trying to remain friends with you may remind her of her transgressions. If she is trying to keep her marriage sound that is not something she would want to remember. Take care,
Zen<font color=green>

Deal with the difficult while it is still easy. Solve large problems when they are still small. Preventing large problems by taking small steps is easier the solving them. Therefore, the Tao person anticipates and lives wisely, by small actions accomplishing great things.--From the Tao Te Ching