I have to agree with Elana. Cheating is the one thing a spouse can do that changes everything forever. Once someone cheats on you, you never quite feel the same about them. It takes time to heal from that. It takes tremendous strength to forgive them. But forgive we must because if we don't we are harboring resentment that rots our life away.
Forgiving does not mean you have to take it any more either. It's just that you no longer hold them accountable for that crime. You move on to the next step in your life what ever that may be, and have peace about yourself and who you are.
You don't need any of his friends stamp of approval. You only need your own! So, stamp yourself APPROVED!!
Take care.