It's hard. Really hard, to deal with infidelity. Especially in a longer term relationship like yours. I was married for almost 27 years when my wife had a short lived affair and it devastated me. That was 8 months ago and I still have some rough days where I struggle with memories, both real and imagined, of d day and them together. Your situation is compounded by the fact that it involves a "friend." Someone you also know. I understand the pain you're going through, friend.
You said that he blocked you guys after you talked to him? That's all well and good, but if possible she needs to block him as well. I don't know how that works if you've been blocked first, but he needs to be blocked on your end as well, and absolutely NO CONTACT between he and your wife ever again. If they're still in contact in any way, shape or form the affair is still ongoing, and if the affair is still ongoing there can be no reconciliation.
You're going to be on an emotional roller coaster for a long time. If reconciliation is your goal, I hope your wife is prepared for the long haul of up and down emotions you're going to be going through. The general rule is that it takes 2 to 5 years just to recover from betrayal trauma like this, and reconciliation can be a lifetime work in progress. Make no mistake, you've been badly traumatized, and she really needs to get that. She also really needs to care about it and be willing to do anything it takes to fix what's been broken. She needs to be 100% on board with fixing this if you're to have a chance of salvaging and rebuilding your marriage. Anything less than 100% from her, and it will not go well.
You need to set some boundaries and both of you need to stick to them. Like I said, one of the first and most non negotiable boundaries needs to be absolutely no contact with her affair partner ever again. He needs to be cut completely from your lives.
[This message edited by Pogre at 4:13 PM, Saturday, December 13th]